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Context of '(Between 8:49 a.m. and 9:02 a.m.) September 11, 2001: NMCC Responds to First Crash at WTC, Notifies Senior Pentagon Officials'

This is a scalable context timeline. It contains events related to the event (Between 8:49 a.m. and 9:02 a.m.) September 11, 2001: NMCC Responds to First Crash at WTC, Notifies Senior Pentagon Officials. You can narrow or broaden the context of this timeline by adjusting the zoom level. The lower the scale, the more relevant the items on average will be, while the higher the scale, the less relevant the items, on average, will be.

A military instruction is issued by the chairman of the Joint Chiefs of Staff, outlining the procedure for dealing with hijackings within the United States. The instruction, titled “Aircraft Piracy (Hijacking) and Destruction of Derelict Airborne Objects,” states that “the administrator, Federal Aviation Administration (FAA), has exclusive responsibility to direct law enforcement activity related to actual or attempted aircraft piracy (hijacking) in the ‘special aircraft jurisdiction’ of the United States. When requested by the administrator, Department of Defense will provide assistance to these law enforcement efforts.” It adds that the National Military Command Center (NMCC) within the Pentagon “is the focal point within Department of Defense for providing assistance. In the event of a hijacking, the NMCC will be notified by the most expeditious means by the FAA. The NMCC will, with the exception of immediate responses as authorized by reference d, forward requests for DOD assistance to the secretary of defense for approval.” [US Department of Defense, 6/1/2001 pdf file] Some will later assume that this requirement for defense secretary approval was new with this instruction. [New York Observer, 6/20/2004] But it has in fact been a requirement since 1997, when the previous instruction was issued, if not earlier. [US Department of Defense, 7/31/1997 pdf file] Although the defense secretary has this responsibility, the 9/11 Commission will conclude that, on the day of 9/11, the “secretary of defense did not enter the chain of command until the morning’s key events were over.” [9/11 Commission, 7/24/2004, pp. 15 pdf file] Secretary of Defense Donald Rumsfeld will later claim that, up to 9/11, terrorism and domestic hijackings were “a law enforcement issue.” [9/11 Commission, 3/23/2004; PBS, 3/25/2004; US Department of Defense, 6/14/2005]

Entity Tags: Donald Rumsfeld, Federal Aviation Administration, US Department of Defense, National Military Command Center

Timeline Tags: Complete 911 Timeline

Shortly after air traffic controllers ask Flight 11 to climb to 35,000 feet, its transponder stops transmitting. A transponder is an electronic device that identifies a plane on a controller’s screen and gives its exact location and altitude. Among other vital functions, it is also used to transmit a four-digit emergency hijack code. Flight control manager Glenn Michael later says, “We considered it at that time to be a possible hijacking.” [Christian Science Monitor, 9/13/2001; MSNBC, 9/15/2001; Associated Press, 8/12/2002] Initial stories after 9/11 suggest the transponder is turned off around 8:13 a.m., but Pete Zalewski, the air traffic controller handling the flight, later says the transponder is turned off at 8:20 a.m. [MSNBC, 9/11/2002] The 9/11 Commission places it at 8:21 a.m. [9/11 Commission, 6/17/2004] Colonel Robert Marr, head of NEADS, claims the transponder is turned off some time after 8:30 a.m. where the Flight 11 hijack was first detected a.m. [ABC News, 9/11/2002]

Entity Tags: Pete Zalewski, Glenn Michael, Robert Marr

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

After Flight 11 fails to respond to an instruction from air traffic control to climb to 35,000 feet (see 8:13 a.m. September 11, 2001), the controller handling it, Pete Zalewski, tries to regain contact with the aircraft. Over the following ten minutes, he makes numerous attempts but without success. (Zalewski says he makes 12 attempts; the 9/11 Commission says nine.) He tries reaching the pilot on the emergency frequency. Zalewski later recalls that initially, “I was just thinking that it was, you know, maybe they—pilots weren’t paying attention, or there’s something wrong with the frequency.… And at first it was pretty much, you know, ‘American 11,’ you know, ‘are you paying attention? Are you listening?’ And there was still no response.” He says, “I went back to the previous sector to see if the pilot had accidentally flipped the switch back over on the—on the radio.” But as Zalewski is repeatedly unable to get any response from Flight 11, he recalls, “I even began to get more concerned.” However, Zalewski claims, it is not until he sees the plane’s transponder go off at around 8:21 that he suspects something is “seriously wrong,” and calls his supervisor for assistance (see (8:21 a.m.) September 11, 2001). And it is not until about 8:25 that he realizes for sure that he is dealing with a hijacking (see (8:25 a.m.) September 11, 2001). It is only then that Boston Center starts notifying its chain of command that Flight 11 has been hijacked (see 8:25 a.m. September 11, 2001). [New York Times, 10/16/2001; MSNBC, 9/11/2002; 9/11 Commission, 7/24/2004, pp. 18; 9/11 Commission, 8/26/2004, pp. 7 and 10-11]

Entity Tags: Pete Zalewski

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Lino Martins.Lino Martins. [Source: NBC]Two Boston flight controllers, Pete Zalewski and Lino Martins, discuss the fact that Flight 11 cannot be contacted. Zalewski says to Martins, “He won’t answer you. He’s nordo [no radio] roger thanks.” [CNN, 9/17/2001; New York Times, 10/16/2001; Guardian, 10/17/2001; MSNBC, 9/11/2002]

Entity Tags: Pete Zalewski, Lino Martins

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Boston flight control begins notifying the chain of command that a suspected hijacking of Flight 11 is in progress. Those notified include the center’s own facility manager, the FAA’s New England Regional Operations Center (ROC) in Burlington, Massachusetts, and the FAA Command Center in Herndon, Virginia (see 8:28 a.m. September 11, 2001). [Federal Aviation Administration, 9/17/2001 pdf file; 9/11 Commission, 8/26/2004, pp. 11] According to the 9/11 Commission, this is consistent with FAA protocol: “From interviews of controllers at various FAA centers, we learned that an air traffic controller’s first response to an aircraft incident is to notify a supervisor, who then notifies the traffic management unit and the operations manager in charge. The FAA center next notifies the appropriate regional operations center (ROC), which in turn contacts FAA headquarters.” [9/11 Commission, 7/24/2004, pp. 458] But according to Ben Sliney, the national operations manager at the FAA’s Command Center, “the protocol was in place that the center that reported the hijacking would notify the military.… I go back to 1964, where I began my air traffic career, and they have always followed the same protocol.” [9/11 Commission, 6/17/2004] Yet Boston Center supposedly will not contact NORAD about Flight 11 until about 12 minutes later (see (8:37 a.m.) September 11, 2001). Already about ten minutes have passed since controllers first noticed a loss of contact with Flight 11 (see (8:15 a.m.) September 11, 2001). Boston reportedly also contacts several other air traffic control centers about the suspected hijacking at this time (see 8:25 a.m. September 11, 2001).

Entity Tags: Boston Air Route Traffic Control Center, Federal Aviation Administration

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The FAA Command Center, the center of daily management of the US air traffic system. On 9/11 it is managed by Ben Sliney (not pictured here).The FAA Command Center, the center of daily management of the US air traffic system. On 9/11 it is managed by Ben Sliney (not pictured here). [Source: CNN]The FAA’s Boston Center calls the FAA Command Center and says it believes Flight 11 has been hijacked and is heading toward the New York Center’s airspace. The Command Center immediately establishes a teleconference between the Boston, New York, and Cleveland air traffic control centers, so Boston can help the other centers understand what is happening, in case Flight 11 should enter their airspace. Minutes later, in line with the standard hijacking protocol, the Command Center will pass on word of the suspected hijacking to the FAA’s Washington headquarters (see 8:32 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 19; 9/11 Commission, 8/26/2004, pp. 11; Spencer, 2008, pp. 21]
National Operations Manager Learns of Hijacking - A supervisor at the Command Center promptly passes on the news of the possible hijacking to Ben Sliney, who is on his first day as the national operations manager there. The supervisor says the plane in question is “American Flight 11—a 767 out of Boston for Los Angeles.” According to author Lynn Spencer, “Sliney flashes back to the routine for dealing with hijackings from the days when they were more common.” The procedure is to “[k]eep other aircraft away from the errant plane. Give the pilots what they need. The plane will land somewhere, passengers will be traded for fuel, and difficult negotiations with authorities will begin. The incident should resolve itself peacefully, although the ones in the Middle East, he recalls, often had a more violent outcome.” Apparently not expecting anything worse to happen, Sliney continues to the conference room for the daily 8:30 staff meeting there (see 8:30 a.m.-8:40 a.m. September 11, 2001).
Command Center a 'Communications Powerhouse' - The FAA Command Center is located in Herndon, Virginia, 25 miles from Washington, DC. According to Spencer, it “is a communications powerhouse, modeled after NASA’s Mission Control. The operations floor is 50 feet wide and 120 feet long, packed with tiered rows of computer stations, and at the front, seven enormous display screens show flight trajectories and weather patterns.” The center has nearly 50 specialists working around the clock, planning and monitoring the flow of air traffic over the United States. These specialists work with airlines and air traffic control facilities to fix congestion problems and deal with weather systems. [Spencer, 2008, pp. 1 and 19-20]

Entity Tags: Federal Aviation Administration, Ben Sliney, New York Air Route Traffic Control Center, Boston Air Route Traffic Control Center, Cleveland Air Route Traffic Control Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Captain Charles Leidig. 
Captain Charles Leidig. [Source: US Navy]Brigadier General Montague Winfield, the deputy director for operations (DDO) in the National Military Command Center (NMCC) at the Pentagon, leaves his post to attend a pre-scheduled meeting, allowing a colleague, who only recently qualified to take over his position, to stand in for him, and not returning to his post until after the terrorist attacks have ended. [9/11 Commission, 7/21/2003 pdf file; 9/11 Commission, 4/29/2004 pdf file; 9/11 Commission, 6/17/2004]
Winfield Attends Air Force-Convened Meeting - Winfield leaves his post to attend what a 9/11 Commission memorandum will call “an unrelated, closed-door personnel meeting convened by the Air Force to discuss the rating of Air Force officers.” [9/11 Commission, 7/21/2003 pdf file] Another Commission memorandum will state that this meeting is a “session for general officers who rated Air Force officers.” It is unclear whether the meeting takes place somewhere in the NMCC or outside the center. The Commission memorandum will only say that it takes place “elsewhere in [Joint Chiefs of Staff] spaces.” At least one of the NMCC’s other qualified DDOs, Brigadier General Norman Seip, is also attending it.
Winfield Asked Colleague to Replace Him on Previous Day - Winfield is temporarily replaced as DDO by Captain Charles Leidig. Leidig only joined the operations directorate of the Joint Chiefs of Staff in July 2001, when he assumed duties as the deputy for Command Center operations. In that, his usual role, he is responsible for the maintenance, operation, and training of watch teams for the NMCC. He qualified to stand in as the DDO in the NMCC about a month ago, in August 2001. The previous afternoon, Winfield asked Leidig to relieve him for a portion of his duty this morning, and Leidig agreed to do so.
Leidig Takes Over as DDO - As arranged, Leidig takes over from Winfield as DDO at 8:30 a.m., allowing Winfield to attend his meeting. Upon arrival at the NMCC, Leidig receives the intelligence and other turn over briefings. After seeing the reports of the plane crashes in New York on television, he will be responsible for convening a significant event conference (see 9:29 a.m.-9:34 a.m. September 11, 2001), which he soon upgrades to an air threat conference (see 9:37 a.m.-9:39 a.m. September 11, 2001). [9/11 Commission, 4/29/2004 pdf file; 9/11 Commission, 6/17/2004 pdf file]
Winfield Does Not Resume Duties until Attacks Are Over - Even though it becomes obvious that a coordinated attack is under way when television shows the second plane hitting the World Trade Center at 9:03 a.m. (see 9:03 a.m. September 11, 2001), Winfield apparently remains in his meeting instead of resuming his duties as DDO (see (Shortly After 9:03 a.m.) September 11, 2001). He will only take over from Leidig as DDO after Flight 93 crashes in Pennsylvania, apparently at around 10:30 a.m. (see (10:30 a.m.) September 11, 2001). [9/11 Commission, 4/29/2004 pdf file; 9/11 Commission, 6/17/2004] In later interviews for television, Winfield will give the impression that he remained in charge of the NMCC throughout the 9/11 attacks, and make no mention of having allowed a stand-in to take his place during this most critical period of time. [CNN, 9/4/2002; ABC News, 9/11/2002]

Entity Tags: Montague Winfield, Norman R. Seip, Charles Leidig

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Lieutenant Colonel Timothy Duffy.Lieutenant Colonel Timothy Duffy. [Source: CBC]After being informed of the possible hijacking of Flight 11, an air traffic controller in the control tower at Otis Air National Guard Base calls the base’s operations desk to let it know that it might be receiving a call from NORAD’s Northeast Air Defense Sector (NEADS). [Spencer, 2008, pp. 27-28] Daniel Bueno, a supervisor at the FAA’s Boston Center, has just called the control tower at Otis Air Base, at Cape Cod, Massachusetts, alerting it to the problems with Flight 11 and requesting military assistance. The controller who took the call told Bueno he needed to call NEADS in order to get fighter jets launched (see (Between 8:30 a.m. and 8:40 a.m.) September 11, 2001). [Filson, 2003, pp. 47; Spencer, 2008, pp. 22]
Tower Controller Calls Operations Desk - According to author Lynn Spencer, the tower controller subsequently “figures a call [to Otis Air Base] will be coming from NEADS soon and a scramble order is likely. He knows the fighter pilots will appreciate the heads-up.” He therefore calls the Otis Air Base operations desk. According to Spencer, the phone is answered by Master Sergeant Mark Rose, who is the superintendent of aviation management, in charge of flight records and currency for the pilots of the 102nd Fighter Wing. [Spencer, 2008, pp. 27] But according to the 102nd Fighter Wing’s own history of the 9/11 attacks, the call is answered by a Technical Sergeant “Margie Woody.” [102nd Fighter Wing, 2001]
Controller Confuses Superintendent - Rose (or Woody, if the wing’s account is correct) is initially confused by the call. The tower controller does not identify himself or say where he is calling from, but instead begins by asking, “What do you have available?” As Spencer will describe, “For all [Rose] knows, this could be a wrong number or a crank call,” so rather than giving information about the base, Rose responds, “What are you talking about?” The controller then identifies himself and explains that he has just received a report about a hijacking. Rose realizes he needs to pass the call on to someone more appropriate.
Pilot Informed of Hijacking - Pilot Lieutenant Colonel Timothy Duffy, who is the director of operations for the 102nd Fighter Wing, is standing next to Rose by the operations desk. Rose tells him, “Duff, you got a phone call,” and then says the caller is “Otis tower—something about an apparent hijacking under way: American 11, a 767, out of Boston and headed for California.” [Spencer, 2008, pp. 27-28] Duffy will later recall his response to this news: “As soon as we heard there was something about a hijacking we got moving.” [Filson, 2003, pp. 50] On his handheld radio he calls Major Daniel Nash, who along with Duffy is an “alert” pilot on duty at this time, and instructs him to suit up ready for any scramble call. [Spencer, 2008, pp. 28] The two pilots will run to the nearby locker room, put on their G-suits and helmets, and then head out toward their jets (see (8:40 a.m.) September 11, 2001). [Cape Cod Times, 8/21/2002; Boston Globe, 9/11/2005] Meanwhile, a commander at Otis will phone NEADS to report the FAA’s request for military assistance (see Shortly After 8:37 a.m. September 11, 2001).
Call Is Not 'the First Notification Received by the Military' - The exact time the tower controller calls the operations desk at is unclear. Duffy will later guess that the call occurs “at about 8:30, 8:35.” [Filson, 10/22/2002; Filson, 2003, pp. 50] But according to the 9/11 Commission Report, “the first notification received by the military—at any level—that American 11 had been hijacked” is when the FAA’s Boston Center calls NEADS just before 8:38 a.m. (see (8:37 a.m.) September 11, 2001). [9/11 Commission, 7/24/2004, pp. 20] According to the102nd Fighter Wing’s history of the 9/11 attacks, the call to the operations desk is made at 8:38 a.m. [102nd Fighter Wing, 2001] Bueno also called the FAA’s Cape Terminal Radar Approach Control (TRACON), which is located on Otis Air Base, at 8:34 a.m., to request that fighters be launched from Otis (see 8:34 a.m. September 11, 2001), and in response, the TRACON contacts the Otis tower and operations desk (see (8:36 a.m.-8:41) September 11, 2001). [Federal Aviation Administration, 4/19/2002; 9/11 Commission, 9/22/2003 pdf file; 9/11 Commission, 9/30/2003 pdf file]

Entity Tags: Timothy Duffy, Otis Air National Guard Base, Daniel Nash

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

FAA headquarters in Washington, DC.FAA headquarters in Washington, DC. [Source: FAA]Four minutes after it is informed of the suspected hijacking of Flight 11 (see 8:28 a.m. September 11, 2001), the FAA Command Center in Herndon, Virginia, passes on word of the hijacking to the operations center at FAA headquarters in Washington, DC. The headquarters is apparently already aware of the hijacking, as the duty officer who speaks with the Command Center responds that security personnel at the headquarters have just been discussing it on a conference call with the FAA’s New England regional office. [9/11 Commission, 7/24/2004, pp. 19; 9/11 Commission, 8/26/2004, pp. 11] According to the 9/11 Commission, “FAA headquarters is ultimately responsible for the management of the national airspace system,” and the operations center there “receives notifications of incidents, including accidents and hijackings.” FAA headquarters has a hijack coordinator, who is “the director of the FAA Office of Civil Aviation Security or his or her designate.” Procedures require that, if a hijacking is confirmed, the hijack coordinator on duty is “to contact the Pentagon’s National Military Command Center (NMCC) and to ask for a military escort aircraft to follow the flight, report anything unusual, and aid search and rescue in the event of an emergency.” Yet, the Commission will state, although “FAA headquarters began to follow the hijack protocol,” it does “not contact the NMCC to request a fighter escort.” [9/11 Commission, 7/24/2004, pp. 16-19] Mike Canavan, who would normally be the FAA’s hijack coordinator, is away in Puerto Rico this morning, and it is unclear who—if anyone—is standing in for him in this critical role (see 8:30 a.m. September 11, 2001). [9/11 Commission, 5/23/2003; 9/11 Commission, 7/24/2004, pp. 17]

Entity Tags: Federal Aviation Administration

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Cape TRACON.Cape TRACON. [Source: FAA]Daniel Bueno, a supervisor at the FAA’s Boston Center, contacts the FAA’s Cape Terminal Radar Approach Control (TRACON), located on Otis Air National Guard Base at Cape Cod, Massachusetts, to alert it to the possible hijacking of Flight 11 and request that it arrange for military assistance in response. [Federal Aviation Administration, 9/17/2001 pdf file; Federal Aviation Administration, 4/19/2002; 9/11 Commission, 2004; 9/11 Commission, 7/24/2004, pp. 20]
Bueno Requests Fighters - After his call is initially answered by an air traffic controller at the Cape TRACON, Bueno is quickly passed on to Tim Spence, an operational supervisor at the facility. Bueno says, “I have a situation with American 11, a possible hijack.” He adds that Flight 11 “departed Boston, going to LAX [Los Angeles International Airport]. Right now he’s south of Albany.” He says, “I’d like to scramble some fighters to go tail him.” Spence replies that he will contact Otis Air Base about the situation, and tells Bueno, “I’ll talk to these guys over here and see what we can do.” Bueno then adds that Flight 11 is currently airborne, is about 40 miles south of Albany, and is visible only on primary radar. [Federal Aviation Administration, 4/19/2002; 9/11 Commission, 9/30/2003 pdf file] Bueno also calls the air traffic control tower at Otis Air Base around this time, to alert it to Flight 11 and request military assistance (see (Between 8:30 a.m. and 8:40 a.m.) September 11, 2001). [Filson, 2003, pp. 47; Spencer, 2008, pp. 22] Whether he makes that call before or after he calls the Cape TRACON is unstated. Immediately after receiving the call from Bueno, Spence will call the Otis control tower to inform it of the situation, and he then calls the operations desk at Otis Air Base to let it know that it may be receiving orders (presumably from NEADS, NORAD’s Northeast Air Defense Sector) soon (see (8:36 a.m.-8:41) September 11, 2001). [9/11 Commission, 9/30/2003 pdf file]
Bueno Supposedly Violating Protocol - Bueno will say he decided to call the Cape TRACON based on his memory of a previous aircraft hijacking. [9/11 Commission, 9/22/2003 pdf file] But according to the 9/11 Commission Report, by trying to get military assistance through the TRACON, the “Boston Center did not follow the protocol in seeking military assistance through the prescribed chain of command.” [9/11 Commission, 7/24/2004, pp. 20] Indeed, Bueno will tell the 9/11 Commission that he knows his call should instead be to NEADS, “but due to the urgency of the circumstance [he] called directly to the FAA contact point for Otis.” [9/11 Commission, 9/22/2003 pdf file] And Spence will tell the Commission that arranging for fighters to be scrambled in response to a hijacking “is not the typical responsibility of an operations supervisor with the FAA,” like himself. He will also say that it is “unusual for the [air traffic control] centers to contact TRACON for information. Normally the FAA receives the call from the military for a scramble, but this time it went the other way around, and then the official order came back down from the military.” [9/11 Commission, 9/30/2003 pdf file]
Bueno Praised by Colleagues for Actions - However, according to the 9/11 Commission, “Bueno gets high marks” from the Boston Center personnel it interviews, “for instinctively calling FAA traffic approach personnel at the location where he knew the fighters to be—Otis [Air National Guard Base].” Even Colin Scoggins, the Boston Center’s military liaison, “who knew that the call had to go to NEADS, did not fault Bueno for trying to call the Air Force wing directly through other FAA personnel.” [9/11 Commission, 9/22/2003 pdf file]

Entity Tags: Cape Terminal Radar Approach Control, Daniel Bueno, Boston Air Route Traffic Control Center, Tim Spence

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Colin Scoggins, the military liaison at the FAA’s Boston Center, claims he makes his first call to NORAD’s Northeast Air Defense Sector (NEADS) regarding Flight 11. He later recalls that he informs NEADS that the aircraft is “20 [miles] south of Albany, heading south at a high rate of speed, 600 knots.” [Griffin, 2007, pp. 43] Flight 11 was over Albany at 8:26 (see (8:26 a.m.-8:29 a.m.) September 11, 2001). [Federal Aviation Administration, 9/17/2001 pdf file] At such a high speed, it would have reached 20 miles south of there around 8:28. However, Scoggins says he is quite certain he only arrives on the floor at Boston Center at around 8:35. He says that although he’d later tried to write up a chronology of events, he “couldn’t get a timeline that made any sense.” Furthermore, Scoggins claims that even before he’d arrived, Joseph Cooper, a Boston Center air traffic management specialist, had already phoned NEADS about the hijacking. [Griffin, 2007, pp. 43 and 335] The 9/11 Commission makes no mention of either call. It says “the first notification received by the military—at any level—that American 11 had been hijacked” is when Boston Center calls NEADS just before 8:38 a.m. (see (8:37 a.m.) September 11, 2001). [9/11 Commission, 7/24/2004, pp. 20] However, a report by ABC News is more consistent with Scoggins’ claims, indicating that Boston Center contacts NEADS about the hijacking earlier, at around 8:31. [ABC News, 9/11/2002] (Boston Center also contacts the FAA’s Cape Cod facility at 8:34 and requests that it notify the military about Flight 11 (see 8:34 a.m. September 11, 2001). Apparently around the same time, it tries contacting a military unit at Atlantic City (see (8:34 a.m.) September 11, 2001).) Scoggins says he makes “about 40 phone calls to NEADS” in total on this day. [Griffin, 2007, pp. 43] NEADS Commander Robert Marr later comments that Scoggins “deserves a lot of credit because he was about the only one that was feeding us information. I don’t know exactly where he got it. But he was feeding us information as much as he could.” [Michael Bronner, 2006]

Entity Tags: Boston Air Route Traffic Control Center, Joseph Cooper, Colin Scoggins, Northeast Air Defense Sector, Robert Marr

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

After being informed of the hijacking of Flight 11, Tim Spence, an operational supervisor at the FAA’s Cape Terminal Radar Approach Control (TRACON), calls the air traffic control tower and then the operations desk at Otis Air National Guard Base, to let them know that they might soon be receiving an order to scramble the base’s fighter jets. [9/11 Commission, 9/30/2003 pdf file; 9/11 Commission, 2004] Daniel Bueno, a supervisor at the FAA’s Boston Center, has just called Spence at the Cape TRACON, which is located on Otis Air Base at Cape Cod, Massachusetts, and said he wanted fighter jets scrambled in response to Flight 11, which is a “possible hijack.” Spence told Bueno he would contact Otis Air Base and see what it could do to help (see 8:34 a.m. September 11, 2001). [Federal Aviation Administration, 4/19/2002; 9/11 Commission, 9/30/2003 pdf file; 9/11 Commission, 8/26/2004, pp. 12]
TRACON Supervisor Calls Otis Tower - Spence will later recall that in the five minutes following the call from Bueno, he makes “as many calls as possible.” He gets on the phone to the air traffic control tower at Otis Air Base, to notify the controllers there of the situation and receive information on who to call next, so as to facilitate Bueno’s request. Spence will recall that the Otis tower controller he speaks to gives him the telephone number for either Otis Air Base’s base operations or the supervisor of flying desk, which is the aviation section of the base operations desk. (He will be unable to recall exactly which number he is given.) Spence will say he “may have been given a second number” by the Otis tower controller, but he “does not recall directly.”
TRACON Supervisor Calls Operations Desk - Spence then calls Otis Air Base’s operations desk. He will later be unable to remember who he speaks with there. But, he will recall, the “general discussion” he has with them is “an introduction of his position, the relay of the information of a hijack from [the FAA’s Boston Center], and a request for information on how to get a fighter scramble.” During the call, Spence acknowledges that he has no authority to authorize a fighter scramble, but he advises those at the base to prepare to receive a scramble order (presumably from NEADS, NORAD’s Northeast Air Defense Sector), since such an order is “probably on its way.” The person at the operations desk gives Spence the phone number for NEADS.
Timing of Calls Unclear - The exact times when Spence calls the control tower and the operations desk at Otis Air Base are unclear. Spence will tell the 9/11 Commission that he makes the call to the control tower immediately after receiving the call from Bueno. [9/11 Commission, 9/30/2003 pdf file] That call ended just before 8:36 a.m. [Federal Aviation Administration, 4/19/2002] However, according to the 9/11 Commission Report, “the first notification received by the military—at any level—that American 11 had been hijacked” is when the FAA’s Boston Center calls NEADS just before 8:38 a.m. (see (8:37 a.m.) September 11, 2001). [9/11 Commission, 7/24/2004, pp. 20] If correct, that would indicate Spence calls the Otis tower at 8:38 a.m. or after. Bueno also called the Otis tower directly, to request military assistance in response to Flight 11 (see (Between 8:30 a.m. and 8:40 a.m.) September 11, 2001), and the tower controller subsequently contacts the base’s operations desk to alert it to the possible hijacking (see (Between 8:31 a.m. and 8:40 a.m.) September 11, 2001). [Filson, 2003, pp. 47; Spencer, 2008, pp. 22, 27-28] It is unclear whether the tower controller calls the operations desk before or after Spence calls it, although Spence will suggest to the 9/11 Commission that Otis Air Base “may have just received a call themselves regarding the situation” when he makes his calls, “but he is not sure.” [9/11 Commission, 9/30/2003 pdf file]

Entity Tags: Tim Spence, Otis Air National Guard Base, Cape Terminal Radar Approach Control

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Tech. Sgt. Jeremy Powell.Tech. Sgt. Jeremy Powell. [Source: Scott A. Gwilt/ Rome Sentinel]The FAA’s Boston Center calls NORAD’s Northeast Air Defense Sector (NEADS) in Rome, NY, to alert it to the suspected hijacking of Flight 11. According to the 9/11 Commission, this is “the first notification received by the military—at any level—that American 11 had been hijacked.” [9/11 Commission, 7/24/2004, pp. 20; 9/11 Commission, 8/26/2004, pp. 13] The call is made by Joseph Cooper, an air traffic controller at the Boston Center, and answered by Jeremy Powell, a technical sergeant on the NEADS operations floor. [Vanity Fair, 8/1/2006; Spencer, 2008, pp. 25] Beginning the call, Cooper says: “Hi. Boston Center TMU [traffic management unit], we have a problem here. We have a hijacked aircraft headed towards New York, and we need you guys to, we need someone to scramble some F-16s or something up there, help us out.” Powell replies, “Is this real-world or exercise?” Cooper answers, “No, this is not an exercise, not a test.” [9/11 Commission, 7/24/2004, pp. 20] Shortly into the call, Powell passes the phone on to Lieutenant Colonel Dawne Deskins (see (8:38 a.m.) September 11, 2001). Deskins identifies herself to Cooper, and he tells her, “We have a hijacked aircraft and I need you to get some sort of fighters out here to help us out.” [Newhouse News Service, 1/25/2002; ABC News, 9/11/2002; Bamford, 2004, pp. 8; Spencer, 2008, pp. 26]
Military Claims Call Goes against Procedure - The 1st Air Force’s official history of the response to the 9/11 attacks will later suggest that Boston Center is not following normal procedures when it makes this call to NEADS. It states: “If normal procedures had taken place… Powell probably wouldn’t have taken that phone call. Normally, the FAA would have contacted officials at the Pentagon’s National Military Command Center who would have contacted the North American Aerospace Defense Command. The secretary of defense would have had to approve the use of military assets to assist in a hijacking, always considered a law enforcement issue.” The only explanation it gives for this departure from protocol is that “nothing was normal on Sept. 11, 2001, and many say the traditional chain of command went by the wayside to get the job done.” [Filson, 2003, pp. 51]
Accounts Conflict over Time of Call - There will be some conflict between different accounts, as to when this vital call from Boston Center to NEADS occurs. An ABC News documentary will indicate it is made as early as 8:31 a.m. [ABC News, 9/11/2002] Another ABC News report will state, “Shortly after 8:30 a.m., behind the scenes, word of a possible hijacking [reaches] various stations of NORAD.” [ABC News, 9/14/2002] NEADS logs indicate the call occurs at 8:40 a.m., and NORAD will report this as the time of the call in a press release on September 18, 2001. [Federal Aviation Administration, 9/17/2001 pdf file; North American Aerospace Defense Command, 9/18/2001] The 8:40 time will be widely reported in the media prior to the 9/11 Commission’s 2004 report. [Associated Press, 8/21/2002; BBC, 9/1/2002; Newsday, 9/10/2002; CNN, 9/11/2002] But tape recordings of the NEADS operations floor that are referred to in the 9/11 Commission Report place the call at 8:37 and 52 seconds. [9/11 Commission, 7/24/2004, pp. 20; Vanity Fair, 8/1/2006] If the 8:37 a.m. time is correct, this would mean that air traffic controllers have failed to successfully notify the military until approximately 12 minutes after they became certain that Flight 11 had been hijacked (see (8:25 a.m.) September 11, 2001), 16 minutes after Flight 11’s transponder signal was lost (see (Between 8:13 a.m. and 8:21 a.m.) September 11, 2001), and 24 minutes after the plane’s pilots made their last radio contact (see 8:13 a.m. September 11, 2001). [9/11 Commission, 6/17/2004] At 8:34, the Boston Center tried contacting the military through the FAA’s Cape Cod facility, which is located on Otis Air National Guard Base, but was told that it needed to call NEADS (see 8:34 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 20; Spencer, 2008, pp. 22]

Entity Tags: Boston Air Route Traffic Control Center, Dawne Deskins, North American Aerospace Defense Command, Joseph Cooper, Northeast Air Defense Sector, Jeremy Powell

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Colonel Robert Marr, the battle commander at NORAD’s Northeast Air Defense Sector (NEADS), tries phoning Major General Larry Arnold, the commander of the Continental United States NORAD Region (CONR), to get authorization to scramble fighter jets in response to the hijacked Flight 11, but Arnold is in a teleconference, so Marr has to leave an urgent message requesting that Arnold call him back. [9/11 Commission, 7/24/2004, pp. 20; Spencer, 2008, pp. 31]
Arnold Unavailable to Authorize Launching Fighters - Marr has just learned that the FAA is requesting NORAD assistance with a possible hijacking (see (8:38 a.m.) September 11, 2001), and has therefore ordered that fighter jets at Otis Air National Guard Base, Massachusetts, be placed on “battle stations,” with the pilots in the cockpits but the engines turned off (see (8:40 a.m.) September 11, 2001). [Filson, 2003, pp. 55; 9/11 Commission, 7/24/2004, pp. 20] He now tries calling Arnold at CONR headquarters, at Tyndall Air Force Base, Florida, to get authorization to scramble the fighters. However, Arnold is in a teleconference with other senior NORAD officials (see (8:30 a.m.-8:40 a.m.) September 11, 2001) and is therefore unavailable to talk to Marr. [Spencer, 2008, pp. 31]
Marr Leaves Urgent Message for Arnold - Marr talks to Colonel Randy Morris, the assistant director of the CONR Regional Air Operations Center, and tells him about the possible hijacking. Morris replies that such an event “falls under law enforcement jurisdiction.” Marr says the FAA has requested military assistance with the hijacking and NEADS is “forward leaning” fighters from Otis Air Base, referring to his order to place Otis fighters on battle stations. [9/11 Commission, 2/3/2004 pdf file] Marr leaves an urgent message for Arnold, stating that he is dealing with a hijacking and requesting that Arnold call him back. [9/11 Commission, 5/23/2003; Spencer, 2008, pp. 31] Arnold will be given Marr’s message after he leaves the teleconference (see (8:40 a.m.) September 11, 2001) and will promptly call Marr back (see (8:42 a.m.) September 11, 2001). [Filson, 2002; 9/11 Commission, 5/23/2003; 9/11 Commission, 2/3/2004 pdf file] It is unclear why no one interrupts the teleconference to fetch Arnold to come and talk with Marr right away, or at least to immediately pass on Marr’s message.
Unclear if Marr Needs Authorization to Scramble Fighters - It is also unclear why Marr seeks authorization from his superior before ordering that fighters be scrambled. According to Lieutenant Colonel Dawne Deskins, the aircraft control and warning officer at NEADS, the mission crew commander at NEADS—i.e. Major Kevin Nasypany—“is the lowest level rank that has the authority to give a scramble order.” However, Deskins will tell the 9/11 Commission: “[S]ince Colonel Marr was in the battle cab, it was his role. Since the decision involved a civilian aircraft, he had to be the one who made the decision.” [9/11 Commission, 10/30/2003 pdf file] The 1st Air Force’s book about the 9/11 attacks will similarly state that the “sector commander” at NEADS, i.e. Marr, “would have authority to scramble the airplanes.” [Filson, 2003, pp. 50] But Arnold will say the reason the Otis fighters are placed on battle stations instead of being scrambled immediately is that aircraft hijacking is “considered a law enforcement issue.” The correct procedure, according to Arnold, is therefore that, if the FAA wants fighters scrambled, it should call the duty officer at the National Military Command Center at the Pentagon. He in turn contacts the NORAD operations center in Cheyenne Mountain, Colorado, to see if fighters are available. The operations center then seeks permission from someone representing the secretary of defense. Finally, “Once that is approved, then we scramble aircraft,” Arnold will say (see June 1, 2001). [Filson, 2002; Code One Magazine, 1/2002; 9/11 Commission, 5/23/2003]

Entity Tags: Randy Morris, Larry Arnold, Robert Marr, Dawne Deskins

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

At the FAA’s Herndon Command Center, the national operations manager, Ben Sliney, learns more details of the hijacking of Flight 11, and becomes involved with the emergency response to it. [Spencer, 2008, pp. 21] A supervisor at the Command Center informed Sliney of the suspected hijacking at just before 8:30 (see 8:28 a.m. September 11, 2001). Soon after, the supervisor interrupted a meeting Sliney was in, to tell him American Airlines had called to report the deteriorating situation on Flight 11 (see 8:30 a.m.-8:40 a.m. September 11, 2001).
Sliney Receives More Details - Sliney heads to the center’s operations floor, where the supervisor gives him further details of the call from American Airlines, including information about flight attendant Betty Ong’s phone call from Flight 11 (see 8:19 a.m. September 11, 2001). The supervisor says the plane’s transponder has been switched off (see (Between 8:13 a.m. and 8:21 a.m.) September 11, 2001), which means no flight data is showing on the screens of air traffic controllers, and the latest information from the FAA’s Boston Center is that Flight 11 has turned south, and is now 35 miles north of New York City. On one of the large screens at the front of the Command Center that shows flight trajectories, Sliney can see that the track for Flight 11 is in “ghost.” This means that, because no transponder data is being received, the computer is displaying track information based on previously stored track data.
Sliney Seeks Information, Requests Teleconference - Sliney instructs his staff to contact facilities along the path the flight appears to be on, to find if anyone is in contact with it or tracking it. [Spencer, 2008, pp. 1 and 19-21] He will later recall, “I figured we’d try to get the people on the ground, the towers in the area, the police departments, anyone we could get to give us information on where this flight was.” [Canadian Broadcasting Corporation, 9/10/2006] Sliney then requests a teleconference between the FAA’s Boston Center, New York Center, and FAA headquarters in Washington, so they can share information about the flight in real time. [Spencer, 2008, pp. 21] The Command Center has already initiated a teleconference between the Boston, New York, and Cleveland Centers, immediately after it was notified of the suspected Flight 11 hijacking. [9/11 Commission, 8/26/2004, pp. 11] However, Sliney apparently does not request military assistance. According to author Lynn Spencer, “The higher echelons at headquarters in Washington will make the determination as to the necessity of military assistance in dealing with the hijacking.” [Spencer, 2008, pp. 21]

Entity Tags: Ben Sliney, Federal Aviation Administration

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Major General Larry Arnold.Major General Larry Arnold. [Source: US Air Force]Major General Larry Arnold, the commander of the Continental United States NORAD Region (CONR), calls Colonel Robert Marr, the battle commander at NORAD’s Northeast Air Defense Sector (NEADS), who is seeking authorization to scramble fighter jets in response to the hijacked Flight 11, and instructs him to “go ahead and scramble them, and we’ll get authorities later.” [9/11 Commission, 7/24/2004, pp. 20; Spencer, 2008, pp. 38-39] After learning that the FAA wants NORAD assistance with a possible hijacking (see (8:38 a.m.) September 11, 2001), Marr tried calling Arnold at CONR headquarters, at Tyndall Air Force Base, Florida, for permission to scramble fighters from Otis Air National Guard Base in Massachusetts (see (8:38 a.m.) September 11, 2001). Arnold was in a teleconference (see (8:30 a.m.-8:40 a.m.) September 11, 2001), so Marr left a message requesting that Arnold call him back. [Aviation Week and Space Technology, 6/3/2002; Filson, 2003, pp. 55-56; Spencer, 2008, pp. 31] With the teleconference now over, Arnold calls Marr on a secure phone line and is informed of the ongoing situation. [9/11 Commission, 5/23/2003; 9/11 Commission, 2/3/2004 pdf file]
Marr Reports Hijacking, Wants to Scramble Fighters - Marr says the FAA’s Boston Center is “reporting a possible hijacked aircraft, real-world, somewhere north of JFK Airport.” He says, “I’ve got Otis [fighters] going battle stations [i.e. with the pilots in the cockpits but the engines turned off] and I’d like to scramble them to military airspace while we try to get approval for an intercept.” Arnold had wondered if the reported hijacking was a simulation, as part of a NORAD training exercise taking place on this day (see (8:40 a.m.) September 11, 2001), and therefore asks, “Confirm this is real-world?” Marr confirms that the hijacking is “real-world.”
Marr Lacks Details of Hijacked Flight - Arnold asks where the hijacked aircraft is and Marr replies: “We don’t have a good location. The FAA says they don’t have it on their scopes, but had it west of Boston and thought it was now heading to New York.” Arnold then asks, “Do we have any other information, type, tail, number of souls on board?” to which Marr replies, “I don’t have all the particulars yet, but we’ll pass them on as we get them.”
Arnold Tells Marr to Scramble Fighters - According to author Lynn Spencer, in response to Marr’s request to scramble the Otis fighters, “Arnold’s instincts tell him to act first and seek authorizations later.” [Spencer, 2008, pp. 38-39] He therefore says, “Go ahead and scramble them, and we’ll get authorities later.” [Filson, 2003, pp. 56; 9/11 Commission, 7/24/2004, pp. 20] Marr tells Arnold he will “scramble Otis to military airspace” while they try to figure out what is going on. [Grant, 2004, pp. 20] Arnold will later recall that it is his and Marr’s intention to place the fighters in “Whiskey 105”—military airspace over the Atlantic Ocean, just south of Long Island—“since neither he nor Marr knew where the hijacked aircraft was.” [9/11 Commission, 2/3/2004 pdf file] Arnold ends by saying, “Let me know when the jets get airborne,” and adds that he will “run this up the chain” of command. Marr will then direct the NEADS mission crew commander to issue the scramble order (see 8:45 a.m. September 11, 2001). Meanwhile, Arnold will call the NORAD operations center in Cheyenne Mountain, Colorado, about the hijacking, and officers there tell him they will contact the Pentagon to get the necessary clearances for the scramble (see (8.46 a.m.) September 11, 2001). [Filson, 2003, pp. 56; Spencer, 2008, pp. 39]

Entity Tags: Robert Marr, Larry Arnold

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Two F-15 fighter jets are scrambled from Otis Air National Guard Base in Cape Cod, Massachusetts, which is 153 miles from New York City. The fighters are launched in response to the hijacked Flight 11, but this plane is already crashing into the World Trade Center at this time (see 8:46 a.m. September 11, 2001). [Washington Post, 9/15/2001; CNN, 9/17/2001; North American Aerospace Defense Command, 9/18/2001; 9/11 Commission, 6/17/2004]
Delay - The FAA’s Boston Center alerted NORAD’s Northeast Air Defense Sector (NEADS) to the hijacking of Flight 11 and requested that fighter jets be scrambled at just before 8:38 a.m. (see (8:37 a.m.) September 11, 2001), but the mission crew commander at NEADS only instructed the leader of his weapons team to launch the Otis fighters at 8:45 a.m. (see 8:45 a.m. September 11, 2001). [Vanity Fair, 8/1/2006]
Otis Aircraft Head to Runway - As soon as the pilots at Otis Air Base are strapped into their aircraft, the green light directing them to launch goes on. They start their engines and taxi out of the hangar to the nearest runway. One of the pilots, Lt. Col. Timothy Duffy, radios his command post for guidance, asking, “Do you have words?” The response he gets is, “Possible hijack, American Flight 11, 737, flight level 290 [29,000 feet], over JFK [International Airport in New York City].” (This flight information is partly incorrect, since American 11 is a 767, not a 737.) According to the Cape Cod Times, the jets will be up in the air before their radar kicks in. [Cape Cod Times, 8/21/2002; Spencer, 2008, pp. 42] The Otis pilots have already been preparing for the scramble order to come since learning of the hijacking from the FAA’s Cape Cod facility, some time shortly after 8:34 a.m. (see (8:36 a.m.-8:41) September 11, 2001). [BBC, 9/1/2002; Spencer, 2008, pp. 27-30] Their jets are reportedly not airborne until seven minutes after being scrambled, at 8:53 a.m. (see 8:53 a.m. September 11, 2001) and there will be conflicting accounts of what their original destination is (see (8:53 a.m.-9:05 a.m.) September 11, 2001). [9/11 Commission, 6/17/2004]

Entity Tags: Timothy Duffy, Otis Air National Guard Base, Daniel Nash

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Judy Martz.Judy Martz. [Source: Publicity photo]Emergency managers from around the US, including Federal Emergency Management Agency (FEMA) Director Joseph Allbaugh and representatives from the emergency management agencies of 47 states, are away from their home states at the time of the terrorist attacks, attending the annual conference of the National Emergency Management Association (NEMA) at a resort in Big Sky, Montana. The main focuses of the event have included the issues of domestic terrorism and weapons of mass destruction. [New York Times, 9/12/2001; State Government News, 10/2001 pdf file] The conference began on September 8, and was originally planned to continue until September 12 (see September 8-11, 2001). [Natural Hazards Observer, 3/2001; National Emergency Management Association, 8/15/2001]
Emergency Managers Learn of Attacks - At 9:00 a.m., conference attendees are scheduled to participate in a series of sessions on domestic preparedness, which has been a key topic for NEMA over the past three years. [National Emergency Management Association, 8/15/2001; State Government News, 10/2001 pdf file] According to the New York Times, “One of the day’s main seminar topics was how to prepare for terrorist attacks.” [New York Times, 9/12/2001] However, numerous pagers go off as officials are notified of the events in New York. By the time officials gather around the television in the resort’s bar to see what is happening, the second plane has hit the World Trade Center (see 9:03 a.m. September 11, 2001) and the nature of the emergency is obvious. [Stateline (.org), 9/10/2002]
Emergency Managers Respond to Attacks - After the emergency managers at the conference see the coverage of the attacks on television, they “automatically organized themselves into particular groups to focus on transportation issues or to capture information,” Trina Hembree, the executive director of NEMA, will later recall. [Stateline (.org), 10/11/2001] The emergency managers, along with federal personnel and private-sector members, go about coordinating their jurisdictions’ responses to the attacks from the resort. Hotel employees add phone lines and equipment so as to enable communication and the tracking of events. A 24-hour emergency operations center is set up, and teams are organized to address specific areas, such as transportation and medical needs. The emergency managers monitor events and stay in contact with their agencies by phone, and also attend briefings at the resort, where they are updated on the national situation. [State Government News, 10/2001 pdf file]
State of Emergency Declared in Montana - Partly due to concerns over the safety of the emergency management officials at the conference, Montana Governor Judy Martz declares a state of emergency. [Stateline (.org), 9/13/2001] Furthermore, roads to the Big Sky resort are closed, and security for the resort is provided by the local sheriff’s department and volunteer fire department, the Montana Highway Patrol, the Montana National Guard, and the FBI.
Arrangements Made to Fly Key Officials Home - The conference’s organizers arrange for military aircraft to fly state emergency management leaders back to their capitals. [New York Times, 9/12/2001; State Government News, 10/2001 pdf file] Allbaugh and officials from several states that are directly involved in the attacks are flown home throughout the day (see (After 11:00 a.m.) September 11, 2001, (After 11:00 a.m.) September 11, 2001, and (After 4:30 p.m.) September 11, 2001), but others at the conference have to drive long distances back to their states.
Emergency Managers 'Not Where They Wanted to Be' - As one news report will later describe, when the attacks occur, “emergency managers were not where they wanted to be.” FEMA spokesman Mark Wolfson will note the inconvenient timing of the attacks, saying that FEMA officials do not know whether they were timed to catch emergency officials off guard. “That would be speculation,” he says. “But it is something that law enforcement investigators might be looking at.” [Stateline (.org), 9/13/2001; State Government News, 10/2001 pdf file] NEMA is the professional association of state emergency management directors. [Natural Hazards Observer, 3/2001] Hundreds of state emergency management officials, including almost all of the US’s state emergency management directors, and most of the senior FEMA staff are in Montana for its annual conference. [Stateline (.org), 9/13/2001; State Government News, 10/2001 pdf file]

Entity Tags: Joseph M. Allbaugh, Judy Martz, Federal Emergency Management Agency, National Emergency Management Association, Trina Hembree, Mark Wolfson

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

In the National Military Command Center (NMCC) at the Pentagon, personnel apparently become aware of the first attack on the World Trade Center from watching the reports on television. According to Steve Hahn, an operations officer there, “We monitor the television networks in the center, and along with the rest of America we saw the smoke pouring from the tower.” Dan Mangino, who is also an operations officer at the NMCC, says, “At first, we thought it was a terrible accident.” [American Forces Press Service, 9/7/2006] The 9/11 Commission later says, “Most federal agencies learned about the crash in New York from CNN.” [9/11 Commission, 7/24/2004, pp. 35] Whether the NMCC was already aware that a hijacking was underway is unclear. According to military instructions, the NMCC is “the focal point within Department of Defense for providing assistance” in response to hijackings in US airspace, and is supposed to be “notified by the most expeditious means by the FAA.” [US Department of Defense, 6/1/2001 pdf file] Boston Air Traffic Control Center started notifying the chain of command of the suspected hijacking of Flight 11 more than 20 minutes earlier (see 8:25 a.m. September 11, 2001). And at 8:32, the FAA’s Command Center in Herndon informed FAA headquarters of the possible hijacking (see 8:28 a.m. September 11, 2001). Yet, according to the 9/11 Commission, although the “FAA headquarters began to follow the hijack protocol,” it “did not contact the NMCC to request a fighter escort.” Supposedly, the first that the military learned of the hijacking was when Boston Air Traffic Control Center contacted NORAD’s Northeast Air Defense Sector (NEADS) about it, at around 8:37 a.m. (see (8:37 a.m.) September 11, 2001). The earliest time mentioned by the 9/11 Commission that the NMCC learns of the Flight 11 hijacking is 9 a.m. (see 9:00 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 19-20 and 35]

Entity Tags: Steve Hahn, Dan Mangino, National Military Command Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Officers in the National Military Command Center (NMCC) at the Pentagon begin notifying senior Pentagon officials about the plane crashing into the World Trade Center after learning of this from television, but they are apparently unaware of the hijacking of Flight 11. [9/11 Commission, 7/21/2003 pdf file; 9/11 Commission, 4/29/2004 pdf file; 9/11 Commission, 7/24/2004, pp. 35] The NMCC’s three main missions are monitoring worldwide events for the Joint Chiefs of Staff (JCS), maintaining a strategic watch component, and maintaining a crisis response component. The NMCC has live feeds from numerous television stations, and the operations team on duty there learned from CNN that an aircraft had hit the WTC (see (8:48 a.m.) September 11, 2001).
NMCC Directors Notify Senior Pentagon Officials of Crash - In response, members of the operations team monitor media reports and begin making notifications up the chain of command. [9/11 Commission, 7/21/2003 pdf file; 9/11 Commission, 4/29/2004 pdf file] Captain Charles Leidig, who is currently standing in temporarily as deputy director for operations in the NMCC (see 8:30 a.m. September 11, 2001), will later recall, “Initially… the National Military Command Center was primarily a means to notify senior leadership that, in fact, an event had occurred.” [9/11 Commission, 6/17/2004] Leidig and Commander Patrick Gardner, the assistant deputy director for operations, start notifying those on the internal JCS notification list, including the office of the chairman of the Joint Chiefs of Staff, about the crash. They also notify the office of the secretary of defense. Based on incorrect information being reported on television, Leidig tells the senior Pentagon officials that a small airplane has crashed into one of the towers of the WTC. [9/11 Commission, 4/29/2004 pdf file; 9/11 Commission, 7/24/2004, pp. 35]
NMCC Unaware of Flight 11 Hijacking - According to military instructions, “the NMCC is the focal point within [the] Department of Defense for providing assistance” in response to aircraft hijackings in US airspace, and, “In the event of a hijacking, the NMCC will be notified by the most expeditious means by the FAA” (see June 1, 2001). [US Department of Defense, 6/1/2001 pdf file] However, while details of the hijacking of Flight 11 have been circulating within the FAA, the 9/11 Commission will say it “found no evidence that the hijacking was reported to any other agency in Washington before 8:46.” The NMCC apparently learns of the hijacking for the first time when one of its officers calls the FAA at 9:00 a.m. (see 9:00 a.m. September 11, 2001). Leidig will recall that, before the second plane hits the WTC at 9:03 a.m., he and Gardner think it is “something unusual… that a light plane had crashed into the WTC and that there was a report of a hijacking.” [9/11 Commission, 4/29/2004 pdf file; 9/11 Commission, 7/24/2004, pp. 35, 462]

Entity Tags: Charles Leidig, Patrick Gardner, National Military Command Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Scott Fry.Scott Fry. [Source: NATO]Vice Admiral Scott Fry, a top official at the Pentagon with important responsibilities, goes to a dental appointment and only becomes involved with the response to the attacks after the second crash in New York. [Creed and Newman, 2008, pp. 4-6] Fry is the director of operations of the Joint Staff, a post he has held since 1998. [US Department of Defense, 9/23/1998; Stars and Stripes, 10/4/2001] In this position, he is responsible for running the National Military Command Center (NMCC)—“the Pentagon’s highly secure nerve center”—and the Executive Support Center (ESC)—a suite of rooms at the Pentagon “where the secretary of defense, the Joint Chiefs of Staff, and other senior officials would meet to discuss urgent matters.” [Creed and Newman, 2008, pp. 5-6] He is due to leave shortly for Italy, where he is to take up an important Navy command. [Department of Defense, 9/4/2001; Stars and Stripes, 10/4/2001; Creed and Newman, 2008, pp. 4-5] Fry is anxious to go to the dentist before leaving for Italy. As he is about to leave his office for a 9:00 a.m. appointment, his executive assistant draws his attention to the television coverage of the first attack in New York. Reportedly believing the crash was “probably just a freak accident,” instead of heading to the NMCC or the ESC, Fry continues to the clinic (which is presumably within the Pentagon), and is in the dentist’s chair when the second attack occurs. His assistant then calls him on his cell phone to alert him to this. Fry reportedly concludes: “One airplane hitting a skyscraper, that was damned suspicious. But two… there was no doubt about it. It had to be a terrorist attack.” He promptly cancels his appointment and hurries to the NMCC. From there, he goes upstairs to the ESC, where a group is already assembling (see Shortly After 9:03 a.m. September 11, 2001). In the ESC, a “video teleconference link could connect them to the White House, the State Department, the CIA, and military commanders throughout the world.” There, Fry discusses events in New York with Defense Secretary Donald Rumsfeld’s aide Stephen Cambone. But, reportedly, what the men know is “not much, except what they could see on TV.” [Creed and Newman, 2008, pp. 4-6] Only a few months previously, on June 1, 2001, a new Defense Department directive on dealing with domestic hijackings was issued under Fry’s signature (see June 1, 2001). [US Department of Defense, 6/1/2001 pdf file]

Entity Tags: National Military Command Center, Scott Fry, Executive Support Center, Stephen A. Cambone

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Captain Deborah Loewer.
Captain Deborah Loewer. [Source: Military Sealift Command]Navy Captain Deborah Loewer, director of the White House Situation Room, tells President Bush a plane has crashed into the World Trade Center when his limousine arrives at the Emma E. Booker Elementary School in Sarasota, Florida, where he is going to attend a reading demonstration. [Associated Press, 11/26/2001; Dayton Daily News, 8/17/2003] Loewer learned about the crash when Rob Hargis, the senior duty officer in the Situation Room, called her as she was being driven to the school and told her what had happened (see (Between 8:48 a.m. and 8:55 a.m.) September 11, 2001). [McClatchy Newspapers, 8/29/2011; Priess, 2016, pp. 239-240] As soon as the president’s motorcade arrives at the school (see (8:55 a.m.) September 11, 2001), she runs toward Bush’s limousine to pass on the news to the president. [Dayton Daily News, 8/17/2003] She approaches Bush and Andrew Card, his chief of staff, as they are walking toward the school’s entrance. She says to Bush, “Mr. President, the Situation Room is reporting that one of the World Trade Center towers has been hit by a plane.” She adds, “This is all we know.” She also says experience has taught her that first reports are often wrong. Bush replies, “Thank you, Captain” as he continues making his way toward the school’s entrance and then says, “Keep me informed.” Loewer is “the first person to inform President Bush that terrorism had struck New York City,” according to the Associated Press. [Associated Press, 11/26/2001; Springfield News-Sun, 9/9/2011; Bohn, 2015, pp. 214; Priess, 2016, pp. 240] However, some accounts will claim that either Karl Rove, Bush’s senior adviser, or Card is the first person to tell the president a plane has crashed into the WTC (see (Shortly After 8:55 a.m.) September 11, 2001). [Sammon, 2002, pp. 41-42; Rove, 2010, pp. 249-250; Politico Magazine, 9/9/2016] After passing on the news about the crash, Loewer goes to the holding room next to the classroom where Bush is going to listen to some children reading. There, she will learn about Flight 175 crashing into the WTC when the attack occurs, at 9:03 a.m. (see 9:03 a.m. September 11, 2001). [Bohn, 2015, pp. 214; Priess, 2016, pp. 240-241]

Entity Tags: Deborah Loewer, George W. Bush, Andrew Card

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Paul Worcester.Paul Worcester. [Source: Paul Blackmore / Cape Cod Times]Senior commanders at Otis Air National Guard Base in Cape Cod, Massachusetts, become aware of the attacks on the World Trade Center from television coverage, and one commander then orders the base’s battle staff to assemble. The commanders have just been in the first of the base’s regular Tuesday morning meetings, which ended at 8:55 a.m. They are taking a short break before the next meeting, which is scheduled for 9:00 a.m., and are apparently unaware that a plane has crashed into the WTC.
Wing Commander Sees Burning WTC on Television - One of those in the meeting was Lieutenant Colonel Paul Worcester, the logistics group commander of the 102nd Fighter Wing, which is based at Otis. As Worcester walks past the break room he notices that everyone inside it is fixated on the television. He goes in to find what they are watching and gets his first sight of the coverage of the burning North Tower. Worcester finds it odd that a plane could have hit the WTC, and thinks to himself: “On such a clear day, planes don’t just go astray. That just doesn’t happen.” Although he is aware that the base’s two F-15s that are kept on alert have been scrambled in response to a suspected hijacking (see 8:46 a.m. September 11, 2001), he does not connect this with what he is seeing on television.
Commanders See Second Attack - Worcester is joined in the break room by more of the senior commanders. They watch as the live television coverage shows Flight 175 crashing into the South Tower (see 9:03 a.m. September 11, 2001), and all of them then realize that America is under attack. One commander immediately shouts out, “We need to go to battle staff!” The senior commanders disperse and head toward the adjacent operations building, where they will reconvene in the battle cab of the installation operations center (see Shortly After 9:03 a.m. September 11, 2001). A voice sounds out over the base’s loudspeakers: “The commander has ordered the 102nd core battle staff to assemble. Please report to the operations building immediately.”
Unit Mobilizes for War - Subsequently, as author Lynn Spencer will describe: “Under the leadership of the [102nd Fighter] Wing commander, the various subordinate group commanders cross-brief on scramble activity, training flight issues, available munitions, personnel available to begin uploading more fighters to combat-ready status, security force increases, and more. In short, they begin to mobilize the wing for war, keeping NEADS [NORAD’s Northeast Air Defense Sector] in the loop on their preparations.” [Spencer, 2008, pp. 87-88, 153-154]
Base Learned of First Hijacking 20 Minutes Earlier - The 102nd Fighter Wing of the Massachusetts Air National Guard, which is based at Otis Air Base, is responsible for protecting the Northeast United States, including New York, Washington, and Boston. Its mission includes defending the region against terrorist attacks. [Cape Cod Times, 9/12/2001; Cape Cod Times, 9/12/2001] On a typical day, it has about a dozen pilots on duty. [Cape Cod Times, 9/15/2001] It is equipped with 18 F-15 fighter jets, two of which are kept on 24-hour alert, ready to be in the air within five minutes of being called upon. [Boston Globe, 9/15/2001; Cape Cod Times, 9/21/2001] These were the two jets that launched at 8:46 a.m. in response to the hijacking of Flight 11. [9/11 Commission, 7/24/2004, pp. 20] The base was notified about this first hijacking shortly after 8:34 a.m. (see (8:36 a.m.-8:41) September 11, 2001). [Spencer, 2008, pp. 27-28] Why the senior commanders did not initiate their crisis response at that time is unclear.

Entity Tags: Paul Worcester, Otis Air National Guard Base

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

A special radio transmitter that is carried by aircraft and designed to go off automatically if a plane crashes is activated in the New York area, several minutes before Flight 175 hits the World Trade Center. David Bottiglia, an air traffic controller at the FAA’s New York Center, receives information from one of the aircraft he is monitoring. A few seconds before 8:59 a.m., the pilot of US Airways Flight 583 tells him, “I hate to keep burdening you with this stuff, but now we’re picking up another ELT on 21.5.” [Federal Aviation Administration, 9/11/2001, pp. 37 pdf file; 9/11 Commission, 10/1/2003 pdf file; 9/11 Commission, 2004] An “ELT” is an emergency locator transmitter, a device carried on most general aviation aircraft in the US that is designed to automatically begin transmitting a distress signal if a plane should crash, so as to help search and rescue attempts at locating the downed aircraft. [Federal Aviation Administration, 3/23/1990; US Department of the Army, 8/12/2008, pp. E-6 pdf file; Aircraft Owners and Pilots Association, 1/22/2009] “21.5” refers to the emergency frequency of 121.5 megahertz that ELTs transmit their distress signals on. [Aircraft Electronics Association, 2009, pp. 36 pdf file] While the pilot’s information would mean an ELT is activated at around 8:58 a.m., Flight 175 will crash into the WTC several minutes later, at 9:03 a.m. and 11 seconds (see 9:03 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 8] And yet there are no reports of an ELT going off at the time of the crash itself. The pilot of Flight 583 earlier on informed Bottiglia of another ELT signal, which had been transmitted shortly before Flight 11 hit the WTC (see 8:44 a.m. September 11, 2001). [New York Times, 10/16/2001; 9/11 Commission, 10/1/2003 pdf file]

Entity Tags: Dave Bottiglia

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Mike Morell, President Bush’s CIA briefer, calls the CIA’s operations center to see if anyone there knows more about what has happened at the World Trade Center and is told that the WTC was hit by a large commercial airliner. [Studies in Intelligence, 9/2006 pdf file; Morell and Harlow, 2015, pp. 48] Morell learned that a plane had crashed into the WTC as he was being driven to the Emma E. Booker Elementary School in Sarasota, Florida, where Bush is going to attend a reading event. White House press secretary Ari Fleischer, who was in the same vehicle as him, received a pager message stating what had happened and then exclaimed, “A plane just hit the World Trade Center” (see (Between 8:48 a.m. and 8:55 a.m.) September 11, 2001). [Bamford, 2004, pp. 17; Politico Magazine, 9/9/2016] Fleischer asked Morell if he knew anything about the incident. “As the in-house intelligence officer, Morell was the man they looked to for the scoop when something startling happened,” journalist and author Mark Bowden will comment. [Bowden, 2012, pp. 3] The CIA officer knew nothing about the incident but said he would make some calls to inquire about it.
CIA Officer Thought the Crash Was an Accident - Morell initially assumed the crash was an accident. “The image in my mind,” he will later recall, “was of a small plane losing its way in a storm or fog and hitting the World Trade Center. I figured the death toll would include only two or three people on the plane and perhaps a few more in offices at the point of impact.” All the same, after entering the school, he calls the operations center at CIA headquarters in Langley, Virginia, to see if anyone there knows more about the crash. He assumes someone there likely will because, he will write, “I had come to rely on the group of hard-working officers in the center, both to set aside for me key pieces of overnight reporting and to answer my many questions.”
CIA Officer Is Told a Large Plane Hit the WTC - However, the duty officer Morell talks to is able to tell him little more than what he already knows. The one new detail the duty officer provides, Morell will recall, is that “the initial reports indicated that the plane [that hit the WTC] was a large commercial jet.” “My hope that this was not terrorism started to fade,” he will write. Morell then walks into the holding room next to the classroom where Bush is going to listen to some children reading and notices that the time is 9:00 a.m. Minutes later, he will learn about Flight 175 crashing into the WTC (see 9:03 a.m. September 11, 2001) and realize immediately that the incident is a “deliberate act of terrorism.” [Studies in Intelligence, 9/2006 pdf file; Morell and Harlow, 2015, pp. 47-48]

Entity Tags: Central Intelligence Agency, Michael J. Morell

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Ryan Gonsalves.Ryan Gonsalves. [Source: Institute for the Study of War]An officer in the National Military Command Center (NMCC) at the Pentagon learns, during a phone call to the FAA, of the hijacking of Flight 11, but the FAA tells him it does not need any help dealing with this, as everything seems to be under control. [9/11 Commission, 4/29/2004 pdf file; 9/11 Commission, 7/24/2004, pp. 35]
NMCC Officer Calls FAA for Information - After those in the NMCC learned from television that an aircraft had crashed into the World Trade Center (see (8:48 a.m.) September 11, 2001), Lieutenant Colonel Ryan Gonsalves, the senior operations officer there, began gathering up as much information as he could on the crisis. One of the phone calls he makes is to the FAA operations center at the agency’s Washington, DC, headquarters. The employee at the operations center who answers the call tells Gonsalves that the FAA has had a report of a hijacking on a plane that departed Boston. [9/11 Commission, 4/29/2004 pdf file; 9/11 Commission, 5/5/2004]
FAA Says It Does Not Need Help - The FAA employee apparently does not connect the plane crashing into the WTC with the hijacked Flight 11, which they claim is still airborne and heading for New York’s JFK International Airport. The entry in the senior operations officer’s log about the call will state: “9:00 NMCC called FAA, briefed of explosion at WTC possibly from aircraft crash. Also, hijacking of American Flight 11 from Boston to LA, now en route to Kennedy.” [9/11 Commission, 7/24/2004, pp. 462] Furthermore, when Gonsalves asks if the FAA needs any assistance dealing with the hijacking, the operations center employee replies, “No,” and says the pilot “had called in and said everything was under control, and he was going to land at New York shortly.” [9/11 Commission, 4/29/2004 pdf file; 9/11 Commission, 5/5/2004] The possibility of scrambling fighter jets is not discussed during the phone call. Even though military instructions state that the NMCC is to be “notified by the most expeditious means by the FAA” in response to aircraft hijackings in US airspace (see June 1, 2001), this call, according to the 9/11 Commission Report, appears to be the first time the FAA informs the NMCC of the hijacking of Flight 11. [US Department of Defense, 6/1/2001 pdf file; 9/11 Commission, 7/24/2004, pp. 35]

Entity Tags: National Military Command Center, Federal Aviation Administration, Ryan Gonsalves

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

An announcement is made over the public address system in the South Tower of the World Trade Center, advising workers that they can begin an orderly evacuation of the building if conditions warrant it. [New York Times, 5/17/2004; 9/11 Commission, 7/24/2004, pp. 289] A previous announcement over the public address system instructed people in the South Tower to stay in, or return to, their offices, rather than evacuate (see (8:50 a.m.) September 11, 2001). [9/11 Commission, 7/24/2004, pp. 287-288; Dwyer and Flynn, 2005, pp. 72] The new announcement begins: “May I have your attention, please. Repeating this message: the situation occurred in Building 1 [i.e. the North Tower].” The announcer then says, “If the conditions warrant on your floor, you may wish to start an orderly evacuation.” [New York Times, 5/17/2004] The announcement is presumably made by Philip Hayes, the deputy fire safety director on duty at the fire command desk in the lobby of the South Tower. A button at the desk enables fire safety directors to deliver announcements over the public address system. [Dwyer and Flynn, 2005, pp. 26]
Identity of Person Who Ordered Evacuation Unclear - The new advice, for tenants to evacuate, does “not correspond to any prewritten emergency instruction,” according to the 9/11 Commission Report. [9/11 Commission, 7/24/2004, pp. 289] It is unclear who told Hayes to make the announcement giving this advice. George Tabeek, the Port Authority’s security manager for the WTC, contacted the fire command desks in the Twin Towers immediately after Flight 11 hit the North Tower, with instructions about what to do. His orders for Hayes, however, were to “keep people inside the South Tower” (see Shortly After 8:46 a.m. September 11, 2001). [New Jersey Star-Ledger, 9/6/2011]
Police Commander Called for Evacuation of WTC - Captain Anthony Whitaker, the Port Authority Police Department (PAPD) commanding officer at the WTC, called for the evacuation of the WTC at 9:00 a.m. (see 8:59 a.m.-9:02 a.m. September 11, 2001). However, his instruction was given over PAPD radio channel W, “which could not be heard by the deputy fire safety director in the South Tower,” according to the 9/11 Commission Report. [Murphy, 2002, pp. 184-185; 9/11 Commission, 7/24/2004, pp. 293; National Institute of Standards and Technology, 9/2005, pp. 201] Furthermore, according to the Port Authority, deputy fire safety directors do not generally take direct orders from the PAPD under the regular chain of command. Therefore, the 9/11 Commission Report will state, it is “not known if [Hayes] received the order by the PAPD to evacuate the complex.” [9/11 Commission, 7/24/2004, pp. 544]
Fire Department Responsible for Ordering Evacuations - According to New York Times reporters Jim Dwyer and Kevin Flynn, “The authority to order an evacuation during a fire normally rests with the fire department.” [Dwyer and Flynn, 2005, pp. 79] In a phone call with his counterpart in the North Tower, at 8:49 a.m., Hayes in fact said he would wait to hear from “the boss from the fire department or somebody” before ordering an evacuation of the South Tower (see 8:49 a.m. September 11, 2001). [Port Authority of New York and New Jersey, 9/11/2001 pdf file; 9/11 Commission, 7/24/2004, pp. 287; Dwyer and Flynn, 2005, pp. 27] But whether someone from the fire department told Hayes to order an evacuation is unknown. It is also unclear how long announcements, advising an evacuation, continue for. Hayes and his counterpart in the North Tower are “making announcements that the situation was serious and that occupants should evacuate immediately” for “[a]s long as the [fire alarm system] was still operational,” according to Fire Engineering magazine. [Fire Engineering, 11/1/2002] However, the 9/11 Commission Report will state, “Evidence suggests that the public address system [in the South Tower] did not continue to function after the building was hit.” This would mean no announcements go out after 9:03 a.m., when Flight 175 hits the tower (see 9:03 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 295] By the time the South Tower collapses (see 9:59 a.m. September 11, 2001), out of around 8,540 people who were originally in the building, 7,940 (93 percent) have made it out and will survive, according to the National Institute of Standards and Technology. [National Institute of Standards and Technology, 9/2005]

Entity Tags: Philip T. Hayes

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Flight 175 hits the WTC South Tower. The picture was taken from a traffic helicopter.Flight 175 hits the WTC South Tower. The picture was taken from a traffic helicopter. [Source: WABC 7/ Salient Stills]Flight 175 hits the South Tower of the World Trade Center (Tower Two). Seismic records pinpoint the time at six seconds before 9:03 a.m. (rounded to 9:03 a.m.). Hijackers Marwan Alshehhi, Fayez Ahmed Banihammad, Mohand Alshehri, Hamza Alghamdi, and Ahmed Alghamdi presumably are killed instantly, and many more in the tower will die over the next few hours. [New York Times, 9/12/2001; CNN, 9/12/2001; CNN, 9/17/2001; North American Aerospace Defense Command, 9/18/2001; USA Today, 12/20/2001; Federal Emergency Management Agency, 5/1/2002, pp. 1-10; New York Times, 5/26/2002; Associated Press, 8/21/2002; USA Today, 9/2/2002] According to the NIST report, the crash time is 9:02:59. [National Institute of Standards and Technology, 9/2005, pp. 38] According to the 9/11 Commission Report, the crash time is 9:03:11. [9/11 Commission, 7/24/2004, pp. 8] Millions watch the crash live on television. The plane strikes the 77th through 85th floors in the 110-story building. Approximately 100 people are killed or injured in the initial impact; 600 people in the tower eventually die. The death toll is far lower than in the North Tower because about two-thirds of the South Tower’s occupants have evacuated the building in the 17 minutes since the first tower was struck. [USA Today, 12/20/2001; National Institute of Standards and Technology, 9/2005, pp. 5-9, 41] The combined death toll from the two towers is estimated at 2,819, not including the hijackers. [Associated Press, 8/21/2002] The impact severs some columns on the south side of the South Tower. Each of the Twin Towers is designed as a “tube-in-tube” structure and the steel columns which support its weight are arranged around the perimeter and in the core. The plane, which is traveling at an estimated speed of around 500 mph (see October 2002-October 2005), severs 33 of the building’s 236 perimeter columns and damages another one. [National Institute of Standards and Technology, 9/2005, pp. 39] The perimeter columns bear about half of the tower’s weight, so the damage to them reduces the tower’s ability to bear gravity loads by about 7.1 percent. [National Institute of Standards and Technology, 9/2005, pp. 6] The actual damage to the 47 core columns is not known, as there are no photographs or videos of it, but there will be much speculation about this after 9/11. It will be suggested that some parts of the aircraft may be able to damage the core even after crashing through the exterior wall (see 8:46 a.m. September 11, 2001). [National Institute of Standards and Technology, 9/2005, pp. 107] According to NIST’s base case model, five of the core columns are severed and another five suffer some damage. [National Institute of Standards & Technology, 9/2005, pp. 235 pdf file] This may reduce the tower’s ability to bear loads by a further approximately 8 percent, meaning that the aircraft impact accounted for a loss of about 15 percent of the building’s strength. This damage will be cited as an event contributing to the building’s collapse after 9/11 (see October 23, 2002 and October 19, 2004). NIST’s base case estimate of damage to the North Tower’s core will be similar, even though the aircraft impact there was dissimilar (see 8:46 a.m. September 11, 2001). Flight 11 hit the North Tower’s core head on, whereas Flight 175 only hits the corner of the South Tower’s core. [National Institute of Standards and Technology, 9/2005, pp. 20-23, 38-41] In addition, some of the fireproofing on the steel columns and trusses may be dislodged (see 8:46 a.m. September 11, 2001). [National Institute of Standards & Technology, 9/2005, pp. xxxvi, 83 pdf file] Photographs and videos of the towers will not show the state of fireproofing inside the buildings, but the National Institute of Standards and Technology (NIST) will try to estimate the damage to fireproofing using a series of computer models. Its severe case model (see (October 2002-October 2005)) will predict that 39 of the 47 core columns are stripped of their fireproofing on one or more floors and that fireproofing is stripped from trusses covering 80,000 ft2 of floor area, the equivalent of about two floors. NIST will say that the loss of fireproofing is a major cause of the collapse (see April 5, 2005), but only performs 15 tests on fireproofing samples (see October 26, 2005). [National Institute of Standards and Technology, 9/2005, pp. 41] According to NIST, less fireproofing is stripped from the North Tower (see 8:46 a.m. September 11, 2001).

Entity Tags: World Trade Center, Marwan Alshehhi, Fayez Ahmed Banihammad, Hamza Alghamdi, National Institute of Standards and Technology, Ahmed Alghamdi, Mohand Alshehri

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Brigadier General Montague Winfield.
Brigadier General Montague Winfield. [Source: US Army]Brigadier General Montague Winfield, the deputy director for operations (DDO) in the National Military Command Center (NMCC) at the Pentagon, apparently remains in a pre-scheduled meeting that is unrelated to the terrorist attacks and does not resume his key duties as DDO, even though others in the NMCC have concluded that the US is under attack. [9/11 Commission, 4/29/2004 pdf file; American Forces Press Service, 9/7/2006] Since around 8:30 a.m., Winfield has been attending what the 9/11 Commission will describe as a “closed-door personnel meeting convened by the Air Force to discuss the rating of Air Force officers.” Captain Charles Leidig, who only qualified to stand in as the DDO about a month previously, has taken over Winfield’s position while he is in the meeting (see 8:30 a.m. September 11, 2001).
NMCC Officers Realize US Is under Attack - Leidig will later recall that after those in the NMCC see Flight 175 crashing into the World Trade Center live on television at 9:03 a.m., “[t]o him it was obvious it was a terrorist attack or a coordinated attack.” [9/11 Commission, 7/21/2003 pdf file; 9/11 Commission, 4/29/2004 pdf file] Other officers in the NMCC also realize this is a terrorist attack (see 9:03 a.m. September 11, 2001). [American Forces Press Service, 9/7/2006] Winfield himself will later describe, “When the second aircraft flew into the second tower, it was at that point that we realized that the seemingly unrelated hijackings that the FAA was dealing with were in fact a part of a coordinated terrorist attack on the United States.” [ABC News, 9/14/2002]
Winfield Stays in Pre-Scheduled Meeting - According to the 9/11 Commission Report, “The job of the NMCC in such an emergency is to gather the relevant parties and establish the chain of command between the National Command Authority—the president and the secretary of defense—and those who need to carry out their orders.” [9/11 Commission, 7/24/2004, pp. 37] However, Winfield does not return to his post, and apparently remains in the Air Force-convened meeting. The reason for this is unclear. According to one 9/11 Commission memorandum, “Such meetings” as Winfield is attending “are generally not disturbed unless the reason is significant.” Winfield will only resume his duties as DDO after Flight 93 crashes in Pennsylvania, apparently at around 10:30 a.m. (see (10:30 a.m.) September 11, 2001). [9/11 Commission, 4/29/2004 pdf file; 9/11 Commission, 6/17/2004] Whether Winfield and the other officers with him in the meeting learn that America is under attack immediately, or are only notified of this later on, is unstated.

Entity Tags: Charles Leidig, Montague Winfield, National Military Command Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Gary Walters.Gary Walters. [Source: C-SPAN]Gary Walters, the chief White House usher, and a few of his colleagues take the time to clear up the White House grounds ready for when President Bush returns, and even continue with the task after the White House is evacuated. Earlier this morning, many White House staffers were busy preparing for the annual Congressional picnic, which was scheduled to take place this evening (see 8:30 a.m. September 11, 2001). About 170 to 180 picnic tables have been set up on the South Lawn for the event. After he learns that a second plane has crashed into the World Trade Center (see 9:03 a.m. September 11, 2001), Walters decides to start moving the picnic tables off the lawn so Bush’s helicopter will be able to land on the grounds when the president returns to the White House. [National Journal, 8/31/2002; Values in World Thought, 4/4/2006; Peter Schnall, 7/12/2016]
Usher Arranges to Clear the Lawn - He coordinates with the National Park Service, which is in charge of the White House grounds, to determine who will be clearing away the picnic tables. [Brower, 2015, pp. 257] He then sets about moving the tables. “I got the staff together and started sending them out to the south grounds—anybody I could think of—because I knew that we had to try to move as quickly as possible,” he will later recall. [National Journal, 8/31/2002] However, at about 9:45 a.m., the White House is evacuated after the Secret Service learns of a possible threat against it (see (9:45 a.m.) September 11, 2001). [Associated Press, 2001 pdf file; CNN, 9/12/2001]
Staffers Continue Clearing the Grounds, despite the Danger - Around this time, Walters sees the smoke coming from the Pentagon, which was attacked at 9:37 a.m. (see 9:37 a.m. September 11, 2001), and realizes the White House could be hit next. And yet he decides that he needs to stay where he is in order to clear up the grounds. “As far as I was concerned, my responsibility was there at the White House,” he will comment. [Brower, 2015, pp. 258] “I knew we had to get those tables out,” he will state, adding, “I even felt more urgency, since obviously this was a coordinated attack now.” [National Journal, 8/31/2002] While the Secret Service is ordering people to run for their lives, Walters grabs a few of his colleagues and tells them they need to stay and help clear away the picnic tables. “I got the word that everybody was evacuating, but we had something that we needed to do,” he will comment. [Brower, 2015, pp. 258] After hearing that another suspicious plane is approaching, however, Walters and his colleagues go to the southeast knoll, a rise in the White House lawn, and just stand there, watching the sky and waiting.
Lawn Is Cleared by Early Afternoon - By around 11:00 a.m., they are becoming impatient. Walters therefore says, “Guys, let’s go move some picnic tables.” The men then start carrying the picnic tables off the lawn. A police officer joins them and eventually about a dozen people are helping them to move the tables. By around 1:00 p.m. all of the tables have been removed from the lawn. At about 3:45 p.m., Walters is called by someone from the military, who asks him to clear the South Lawn so the president’s helicopter will be able to land there. Walters laughs and says this has already been done. [National Journal, 8/31/2002] The president’s helicopter, with Bush on board, will land on the South Lawn at around 6:55 p.m. (see (6:54 p.m.) September 11, 2001). [CNN, 9/12/2001; Rove, 2010, pp. 263]
Usher Will Later Justify His Actions - Walters will, in 2016, explain why he made the effort to clear up the White House grounds, despite the danger to himself and his colleagues. “One of the things that I turned to in my own mind on 9/11 was the role that the White House plays in disasters, wars,” he will say, adding, “People have a tendency to turn to the White House.” He will continue: “And I knew that the president wasn’t gonna be satisfied talking from a bunker somewhere or away from the White House. And that’s why we put the effort that we did into cleaning up the south grounds, so that [his] helicopter could land there. That was what the American people were used to seeing—the presidential helicopter coming in—and the president was going to address the nation from the Oval Office.” [Peter Schnall, 7/12/2016]

Entity Tags: National Park Service, Gary Walters

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Laura Bush, the president’s wife, leaves the White House in her limousine, on her way to Capitol Hill where she is scheduled to testify before a Congressional committee, but she is unaware that a second plane has crashed into the World Trade Center. [Us Weekly, 10/15/2001; National Journal, 8/31/2002; Bush, 2010, pp. 198] Bush is set to appear before the Senate Committee on Health, Education, Labor, and Pensions, where she will talk about early childhood education. [CNN, 9/12/2001; CNN, 9/11/2002] She was informed of the first crash at the WTC by her lead Secret Service agent as she was getting into her limousine (see (8:55 a.m.) September 11, 2001).
First Lady Unaware of Second Crash - The limousine leaves the White House at 9:07 a.m., according to Noelia Rodriguez, the first lady’s press secretary. [National Journal, 8/31/2002] The second aircraft, Flight 175, hit the WTC four minutes earlier (see 9:03 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 8] However, Bush and those with her in the limousine are unaware of this. [Bush, 2010, pp. 197-198]
First Lady Thinks about Canceling Hearing - Nevertheless, Bush already thinks the Senate hearing she is on her way to should perhaps be canceled, because New York Senator Hillary Clinton is on the education committee and is therefore supposed to attend. Bush will comment, “Even after the first [crash], when I thought it was just an accident, I thought we probably should cancel, because Mrs. Clinton was on the committee and she’s from New York, and she’d probably want to rush home at that time.” [USA Today, 9/10/2001; Gerhart, 2004, pp. 162] All the same, Bush continues with the two-mile journey from the White House to Capitol Hill. She will learn of the second crash, and realize this is a terrorist attack, shortly before arriving at the Russell Senate Office Building, where the hearing is set to take place (see (9:14 a.m.) September 11, 2001).
Secret Service Allows Bush to Head to Event - Members of Bush’s Secret Service detail apparently raise no objection to Bush going ahead with her trip to Capitol Hill. [CNN, 9/11/2002; Gerhart, 2004, pp. 162; Bush, 2010, pp. 198] The Secret Service is responsible for protecting the first lady, and she is considered to be one of the nation’s “most visible targets.” [US Department of the Treasury, 5/8/2001; Office of Management and Budget, 7/2001, pp. 82 pdf file] The agency’s mission includes keeping her “in sight and out of harm’s way,” according to a book about the Secret Service by author Philip Melanson. [Melanson, 2002, pp. 273] And, as one of the Secret Service’s “permanent protectees,” the first lady, like the president, has a detail of special agents assigned to her. [United States Secret Service, 2002] Bush currently travels with four Secret Service agents and two Secret Service cars. [Kessler, 2006, pp. 136; Kessler, 2009, pp. 181] However, the Secret Service will only take her away from Capitol Hill to a “secure location”—actually the agency’s headquarters—after the terrorist attacks have ended (see (10:10 a.m.-10:55 a.m.) September 11, 2001). [Associated Press, 9/11/2001; National Journal, 8/31/2002; Kessler, 2006, pp. 136]

Entity Tags: Laura Bush, US Secret Service, Noelia Rodriguez

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The jet fuel that spilled from Flight 175 when it hit the South Tower (see 9:03 a.m. September 11, 2001) has mostly burned up by this time. The National Institute of Standards and Technology (NIST), which later investigates the collapses, will say the “initial jet fuel fires themselves lasted at most a few minutes.” [National Institute of Standards and Technology, 9/2005, pp. 183] Engineering professor Forman Williams will say the jet fuel “burned for maybe 10 minutes.” [Popular Mechanics, 3/2005] Flight 175, a Boeing 767, had a capacity of 23,980 gallons, but was only carrying about 9,100 gallons of fuel when it hit the WTC. NIST will estimate that less than 1,500 gallons were consumed in a fireball inside the tower and 910 to 2,275 gallons were consumed in the fireballs outside the building. Approximately 6,100 gallons therefore splashed onto the office furnishings and started fires on various floors. However, after the jet fuel is used up, office fires burn until the building collapses. NIST will calculate that there were about four pounds per square foot of combustibles in the office space, or about 60 tons per floor. Offices in the WTC actually had fewer combustibles than other similar spaces due to the small number of interior walls and limited bookshelf space. NIST will later find that only three of sixteen perimeter columns it recovers reached a temperature of 250°C and neither of the two core columns it retrieves reached this temperature. NIST will also find that none of the samples it acquires reached a temperature above 600°C (see August 27, 2003). While steel does not melt until its temperature is about 1,600°C, it may begin to lose significant strength at over 500°C. [National Institute of Standards and Technology, 9/2005, pp. 29, 38, 42, 77] The jet fuel also burned up in the North Tower about 10 minutes after it was hit (see 8:57 a.m. September 11, 2001). When a group of firefighters reach the bottom impact floor in the South Tower just before collapse, they only find two isolated fires (see 9:52 a.m. September 11, 2001).

Entity Tags: World Trade Center, National Institute of Standards and Technology, Forman Williams

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Noelia Rodríguez.Noelia Rodríguez. [Source: Harvard University]Laura Bush, the president’s wife, is told that a second plane has crashed into the World Trade Center and realizes this is a terrorist attack while she is being driven from the White House to Capitol Hill, where she is scheduled to testify before a Congressional committee. [Us Weekly, 10/15/2001; CNN, 9/11/2002; Bush, 2010, pp. 197-198] Bush is set to appear before the Senate Committee on Health, Education, Labor, and Pensions at 10:00 a.m., where she will talk about early childhood education. [USA Today, 9/10/2001; CNN, 9/12/2001; CNN, 9/11/2002] Her lead Secret Service agent informed her of the first crash at the WTC as she was getting into her limousine, outside the White House, but she’d thought the crash was an accident (see (8:55 a.m.) September 11, 2001). [National Journal, 8/31/2002; Gerhart, 2004, pp. 162]
First Lady Told of Second Crash, Knows It Is Terrorism - The Secret Service agents traveling with Bush now tell the first lady about the second crash at the WTC while her limousine is driving up Pennsylvania Avenue, approaching Capitol Hill. “The car fell silent; we sat in mute disbelief,” Bush will later recall. “One plane might be a strange accident; two planes were clearly an attack.” She will note, “We knew then that it was terrorism.” [CNN, 9/11/2002; Bush, 2010, pp. 198]
Members of First Lady's Staff Learn of Crash - Members of Bush’s staff also learn about the second crash around this time, while they are on their way to Capitol Hill. Ashleigh Adams, the first lady’s deputy press secretary, learns of it while traveling in the press van. “It must have been only a couple of minutes after we departed the White House,” Adams will recall, “that the reporters’ and photographers’ pagers and cell phones started to go off, and someone shouted to me, ‘Ashleigh, the second Twin Tower was hit.’” Adams calls Noelia Rodriguez, the first lady’s press secretary, who is traveling in the staff van, and tells her the news. After Rodriguez arrives on Capitol Hill, she will jump out of the staff van, run to Bush’s limousine, and get inside. But she will find that the first lady has already been informed of the second crash. [National Journal, 8/31/2002]
First Lady Learns of Crash 11 Minutes after It Occurs - Bush will recall that she arrives at the Russell Senate Office Building, where the hearing she is set to attend is supposed to take place, two minutes after she is told about the second crash, at 9:16 a.m., meaning she learns of the crash at 9:14 a.m. [Bush, 2010, pp. 198] This is 11 minutes after the second plane, Flight 175, hit the WTC (see 9:03 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 8]

Entity Tags: Ashleigh Adams, Noelia Rodriguez, Laura Bush, US Secret Service

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Frank Brogan.Frank Brogan. [Source: Publicity photo]The Secret Service allows President Bush to stay at the Emma E. Booker Elementary School in Sarasota, Florida, after a reading demonstration he was participating in has ended, even though he could be in danger at the school. [St. Petersburg Times, 7/4/2004; Politico Magazine, 9/9/2016] Bush has just left the classroom where the reading demonstration was held and entered a holding room next to it. There, he talks on the phone with officials in Washington, DC, and works on a statement to the nation that he wants to deliver before leaving the school (see (9:16 a.m.-9:29 a.m.) September 11, 2001). Members of his staff in the holding room apparently have little information about the terrorist attacks beyond what has been reported on television. They are in contact with the White House Situation Room but not the Pentagon and, according to the 9/11 Commission Report, “No one in the traveling party had any information during this time that other aircraft were hijacked or missing.” [Washington Times, 10/7/2002; 9/11 Commission, 7/24/2004, pp. 38-39] All the same, Secret Service agents and other personnel with the president are concerned that Bush could be in danger at the school, and some of them are worried that terrorists might attack the place (see (9:04 a.m.-9:33 a.m.) September 11, 2001). [Studies in Intelligence, 9/2006 pdf file; Politico Magazine, 9/9/2016]
Bush's Lead Agent Wants to Evacuate the President - Edward Marinzel, the head of Bush’s Secret Service detail, is “eager to get the president out of the school, to Air Force One, and airborne,” according to Karl Rove, Bush’s senior adviser. [Rove, 2010, pp. 251] He therefore approaches Bush and tells him, “We need to get you to Air Force One and get you airborne.” [Politico Magazine, 9/9/2016] However, his concern does not result in Bush being evacuated from the school right away. The Secret Service will later tell the 9/11 Commission that although its agents “were anxious to move the president to a safer location” while he was in the holding room, they “did not think it imperative for him to run out the door.” [9/11 Commission, 7/24/2004, pp. 39]
Chief of Staff Wants Bush to Give His Speech before Leaving - Andrew Card, Bush’s chief of staff, suggests that Bush should be allowed to give his speech to the nation from the school before leaving. He says that “we have a whole auditorium full, waiting for the next event”—meaning Bush’s speech—and there is “no imminent threat there in Sarasota,” according to Dave Wilkinson, assistant special agent in charge of the presidential protection division. The Secret Service therefore accepts a compromise and agrees that Bush can give his speech before leaving. [Politico Magazine, 9/9/2016]
Bush Should Be Taken to the 'Closest Secure Location' - Author Philip Melanson, an expert on the Secret Service, will criticize Bush’s Secret Service detail for failing to get the president away from the school immediately after the second hijacked plane crashed into the World Trade Center, at 9:03 a.m. (see 9:03 a.m. September 11, 2001). “With an unfolding terrorist attack, the procedure should have been to get the president to the closest secure location as quickly as possible, which clearly is not a school,” he will state. [St. Petersburg Times, 7/4/2004] Bush himself will comment on the situation while he is in the holding room, saying, “One thing for certain: I needed to get out of where I was.” [Sammon, 2002, pp. 93]
Bush Refuses to Leave - And yet the president refuses to leave the school at this time when he is urged to do so, according to Frank Brogan, lieutenant governor of Florida, who is in the holding room with him. “The Secret Service tried to get the president to return to Air Force One immediately,” Brogan will state, “but he refused, saying he was committed to staying on the ground long enough to write a statement about what was happening, read it to the nation, and lead a moment of silence for the victims.” [University Press, 9/18/2003] Bush “was courageously insistent about remaining on the ground to make a statement to the people of America,” Brogan will comment. [South Florida Sun-Sentinel, 9/11/2011] Bush will give his speech to the nation, which will be broadcast live on television, from the school library at 9:30 a.m. (see 9:30 a.m. September 11, 2001). [White House, 9/11/2001; Bohn, 2015, pp. 215] He will finally leave the school at around 9:35 a.m. (see (9:34 a.m.) September 11, 2001). [9/11 Commission, 7/24/2004, pp. 39]

Entity Tags: Edward Marinzel, Frank Brogan, George W. Bush, US Secret Service, Andrew Card, Karl C. Rove, Dave Wilkinson, Philip Melanson

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Brian Wilson.Brian Wilson. [Source: Publicity photo]There is apparently no increase in the level of security at the Capitol building in Washington, DC, even though First Lady Laura Bush has arrived at the nearby Russell Senate Office Building and more than 10 minutes have passed since a second plane hit the World Trade Center. [Gilbert et al., 2002, pp. 64; 9/11 Commission, 7/24/2004, pp. 8; Bush, 2010, pp. 198] At 9:16 a.m., Bush arrived at the Russell Senate Office Building, located just north of the Capitol building, where she was scheduled to testify before a Senate committee at 10:00 a.m. [USA Today, 9/10/2001; CNN, 9/12/2001; Bush, 2010, pp. 198]
Reporter Sees No Signs of Increased Security - The first lady is considered one of the nation’s “most visible targets,” and, as one of the Secret Service’s “permanent protectees,” like the president, she has a detail of special agents assigned to her. [US Department of the Treasury, 5/8/2001; Office of Management and Budget, 7/2001, pp. 82 pdf file; United States Secret Service, 2002] And yet, even though Bush has arrived on Capitol Hill, and over 10 minutes have passed since the second aircraft hit the WTC (see 9:03 a.m. September 11, 2001), there is apparently no increase in the level of security at the Capitol building. Fox News correspondent Brian Wilson will later recall that when reporting from the Capitol building around this time, he is “talking about the first lady being in the Capitol and saying that I had not seen any signs of tighter security in the building.”
Reporter Surprised at Plan to Hold a Photo Op - Wilson is also surprised that, although the Senate hearing Bush was scheduled to attend has been canceled, the first lady is still going to make a public appearance. He will comment that “they were (incredibly) trying to set up a brief photo opportunity.” [Gilbert et al., 2002, pp. 64; 9/11 Commission, 7/24/2004, pp. 8] (Wilson is presumably referring to Laura Bush’s appearance before reporters and cameras alongside Senators Edward Kennedy (D-MA) and Judd Gregg (R-NH), which takes place at 9:41 a.m. (see 9:41 a.m. September 11, 2001). [Associated Press, 9/11/2001; CNN, 9/11/2001; Bush, 2010, pp. 199] )
Capitol Evacuated Later On - The Capitol building will only be evacuated at 9:48 a.m., apparently in response to reports of a plane heading toward it (see 9:48 a.m. September 11, 2001). [Associated Press, 9/11/2001; Associated Press, 8/21/2002; CNN, 9/11/2006] The first lady will only be taken away from the Russell Office Building to a “secure location” by members of the Secret Service at 10:10 a.m. (see (10:10 a.m.-10:55 a.m.) September 11, 2001). [Associated Press, 9/11/2001; National Journal, 8/31/2002; Bush, 2010, pp. 200]

Entity Tags: Brian Wilson, Laura Bush, US Capitol building

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Members of the Secret Service’s uniformed division.Members of the Secret Service’s uniformed division. [Source: Joe Marquette / Associated Press]The Secret Service begins implementing a number of security enhancements around the White House complex. [9/11 Commission, 7/24/2004, pp. 35-36] The measures are apparently being implemented on the orders of a number of senior Secret Service agents who have been meeting in the office of Carl Truscott, the special agent in charge of the presidential protective division, who is responsible for the overall security of the White House (see (9:18 a.m.) September 11, 2001). During that meeting, according to Truscott, the agents have discussed “security enhancements at the White House,” such as “placing counter-sniper support on the White House” and “placing counter-surveillance units near the White House.” [United States Secret Service, 10/1/2001] The officials who ordered the security enhancements “did not know that there were additional hijacked aircraft or that one such aircraft was en route to Washington,” according to the 9/11 Commission Report. The measures are simply “precautionary steps taken because of the strikes in New York.” [9/11 Commission, 7/24/2004, pp. 36] However, once the Secret Service has established a perimeter around the White House, its uniformed division officers are ordered “to stow their submachine guns out of sight,” according to US News and World Report, because officials fear that they look too “militaristic.” The uniformed division officers are furious about this. “All we were left with were our pistols,” one of them will later complain. [US News and World Report, 12/1/2002] The security enhancements are initiated after 9:03 a.m., when the second plane hit the World Trade Center, according to the 9/11 Commission Report (see 9:03 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 35-36] However, the meeting of senior Secret Service agents during which the measures were discussed began at around 9:18 a.m., according to Truscott, which would indicate that the measures are initiated some time after 9:18 a.m. [United States Secret Service, 10/1/2001] Furthermore, the Secret Service will only order that the White House be evacuated at around 9:45 a.m. (see (9:45 a.m.) September 11, 2001). [Associated Press, 2001 pdf file; CNN, 9/12/2001]

Entity Tags: US Secret Service

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The FAA sets up a hijacking teleconference with several agencies, including the Defense Department. This is almost one hour after the FAA’s Boston flight control began notifying the chain of command (see 8:25 a.m. September 11, 2001) and notified other flight control centers about the first hijacking at 8:25 a.m. (see 8:25 a.m. September 11, 2001). According to the Acting FAA Deputy Administrator Monte Belger, this teleconference (called the “hijack net”) is “the fundamental primary source of information between the FAA, [Defense Department], FBI, Secret Service, and… other agencies.” Yet even after the delay in setting it up, FAA and Defense Department participants later claim it plays no role in coordinating the response to the hijackings. The 9/11 Commission says, “The NMCC [National Military Command Center inside the Pentagon] officer who participated told us that the call was monitored only periodically because the information was sporadic, it was of little value, and there were other important tasks. The FAA manager of the teleconference also remembered that the military participated only briefly before the Pentagon was hit.” [9/11 Commission, 6/17/2004; 9/11 Commission, 7/24/2004, pp. 36] According to a statement provided by the FAA to the 9/11 Commission in 2003, this teleconference began significantly earlier—“[w]ithin minutes after the first aircraft hit the World Trade Center” (see (8:50 a.m.) September 11, 2001). [9/11 Commission, 5/23/2003]

Entity Tags: Federal Aviation Administration, Monte Belger, US Department of Defense, 9/11 Commission

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

According to the 9/11 Commission, NEADS is contacted by the FAA’s Boston Center. Colin Scoggins, Boston Center’s military liaison, tells it: “I just had a report that American 11 is still in the air, and it’s on its way towards—heading towards Washington.… That was another—it was evidently another aircraft that hit the tower. That’s the latest report we have.… I’m going to try to confirm an ID for you, but I would assume he’s somewhere over, uh, either New Jersey or somewhere further south.” The NEADS official asks: “He—American 11 is a hijack?… And he’s heading into Washington?” Scoggins answers yes both times and adds, “This could be a third aircraft.” Somehow Boston Center has been told by FAA headquarters that Flight 11 is still airborne, but the 9/11 Commission will say it hasn’t been able to find where this mistaken information came from.
Scoggins Makes Error - Vanity Fair magazine will later add, “In Boston, it is Colin Scoggins who has made the mistaken call.” Scoggins will explain why he believes he made this error: “With American Airlines, we could never confirm if [Flight 11] was down or not, so that left doubt in our minds.” He says he was monitoring a conference call between FAA centers (see 8:28 a.m. September 11, 2001), “when the word came across—from whom or where isn’t clear—that American 11 was thought to be headed for Washington.” However, Boston Center was never tracking Flight 11 on radar after losing sight of it near Manhattan: “The plane’s course, had it continued south past New York in the direction it was flying before it dipped below radar coverage, would have had it headed on a straight course toward DC. This was all controllers were going on.” Scoggins says, “After talking to a supervisor, I made the call and said [American 11] is still in the air.” [Northeast Air Defense Sector, 9/11/2001; 9/11 Commission, 6/17/2004; Vanity Fair, 8/1/2006]
Myers Refers to Mistaken Report - In the hours following the attacks, acting Chairman of the Joint Chiefs of Staff Richard Myers will apparently refer to this erroneous report that Flight 11 is still airborne and heading toward Washington, telling the Associated Press that “prior to the crash into the Pentagon, military officials had been notified that another hijacked plane had been heading from the New York area to Washington.” Myers will say “he assumed that hijacked plane was the one that hit the Pentagon, though he couldn’t be sure.” [Associated Press, 9/11/2001]

Entity Tags: Richard B. Myers, Northeast Air Defense Sector, Federal Aviation Administration, Boston Air Route Traffic Control Center, Colin Scoggins

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The National Miilitary Command Center, inside the Pentagon.The National Miilitary Command Center, inside the Pentagon. [Source: US Department of Defense]The National Military Command Center (NMCC) at the Pentagon finally commences and runs a “significant event conference” in response to the ongoing crisis, 26 minutes after the second plane hit the World Trade Center and officers in the NMCC realized the US was under terrorist attack. [9/11 Commission, 6/17/2004 pdf file; 9/11 Commission, 7/24/2004, pp. 37; American Forces Press Service, 9/7/2006]
NMCC Directors Decided to Establish Conference - After those in the NMCC saw Flight 175 hitting the WTC live on television at 9:03 a.m. (see 9:03 a.m. September 11, 2001), Captain Charles Leidig, the acting deputy director for operations (DDO) in the center throughout the attacks, and Commander Pat Gardner, the assistant DDO, talked about the need to convene a significant event conference so there could be a discussion of what actions were to be taken in response. The DDO and the assistant DDO are the two officers responsible for deciding what type of conference the NMCC should convene, and when it should do so. Because there is no specific procedure for dealing with terrorist attacks, Leidig and Gardner decided a significant event conference would most suit their needs, because it would have the flexibility of allowing more people to be added in as required. They also discussed who would need to be on this conference. [9/11 Commission, 4/29/2004 pdf file] But Major Charles Chambers, who is currently on duty in the NMCC, will give a slightly different account. According to Chambers, Staff Sergeant Val Harrison had a phone in her hand and said NORAD was asking for a significant event conference. Leidig had agreed, and so Harrison started establishing the conference.
Conference Begins with Recap of Situation - According to Chambers, “The computer does a mass dialing to connect to those command centers that are always included” in an NMCC conference call, but Harrison also had to manually call the civilian agencies that were going to be included in the conference, such as the FAA, the FBI, and the Federal Emergency Management Agency (FEMA). [US Department of Defense, 9/2001] The conference then begins at 9:29 a.m. with a brief recap: Two aircraft have hit the WTC, there is a confirmed hijacking of Flight 11, and fighter jets have been scrambled from Otis Air National Guard Base in Massachusetts (see 8:46 a.m. September 11, 2001). The FAA is asked to provide an update, but its line is silent as the agency has not yet been added to the call (see (9:29 a.m.-12:00 p.m.) September 11, 2001). A minute later, Leidig states that it has just been confirmed that Flight 11 is still airborne and is heading toward Washington, DC. (This incorrect information apparently arose minutes earlier during a conference call between FAA centers (see 9:21 a.m. September 11, 2001).) [9/11 Commission, 7/24/2004, pp. 37] NMCC conference calls are moderated by the DDO. [9/11 Commission, 7/21/2003 pdf file] Leidig will tell the 9/11 Commission that they are conducted over “a special phone circuit, and it’s classified to be able to pass information, relay information between very senior leadership all the way over to the White House.” [9/11 Commission, 6/17/2004]
NMCC Struggled to Convene Conference - Some officers currently on duty in the NMCC will later complain about circumstances that delayed the establishing of the significant event conference. Chambers will recall that the conference took “much longer than expected to bring up.” [US Department of Defense, 9/2001] Gardner will tell the 9/11 Commission that the NMCC had been “struggling to build the conference,” which “didn’t get off as quickly as hoped.” [9/11 Commission, 5/5/2004] He will describe his “frustration that it wasn’t brought up more quickly.” [9/11 Commission, 5/12/2004]
Other Conference and Connection Problems Delayed Call - Preparations for the conference were disrupted as a result of the CIA convening a National Operations and Intelligence Watch Officer Network (NOIWON) conference call between government agencies in the Washington area, reportedly at sometime between 9:16 a.m. and 9:25 a.m. (see (Between 9:16 a.m. and 9:25 a.m.) September 11, 2001). According to a 9/11 Commission memorandum, the NMCC had “abandoned its attempt to convene a [significant event conference] so its watch officers could participate in the NOIWON conference.” [Federal Aviation Administration, 9/11/2001; Federal Aviation Administration, 9/11/2001; 9/11 Commission, 7/21/2003 pdf file] Another factor that slowed attempts to convene the significant event conference was a problem with connecting some agencies to it. According to Chambers, “A couple of the civil agencies couldn’t be reached and others kept dropping off moments after connecting.” He will recall, “We finally decided to proceed without those agencies that were having phone problems.” [US Department of Defense, 9/2001] Leidig had announced that the NMCC would have to start without those agencies and add them to the conference later on. [9/11 Commission, 5/12/2004]
Call Ends after Five Minutes - The significant event conference ends after only a few minutes, following a recommendation by NORAD that it be reconvened as an “air threat conference.” It is brought to an end at around 9:34 a.m., and will resume as an air threat conference at 9:37 a.m. (see 9:37 a.m.-9:39 a.m. September 11, 2001). [9/11 Commission, 4/29/2004 pdf file; 9/11 Commission, 7/24/2004, pp. 37]

Entity Tags: Charles Leidig, Federal Aviation Administration, Val Harrison, Patrick Gardner, Charles Chambers, North American Aerospace Defense Command, National Military Command Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Thomas Von Essen.Thomas Von Essen. [Source: Publicity photo]The Office of Emergency Management’s Emergency Operations Center (EOC) in World Trade Center Building 7 is evacuated in response to a report that more commercial planes are unaccounted for. [9/11 Commission, 7/24/2004, pp. 305] The EOC, which opened in 1999 (see June 8, 1999), is a state-of-the-art facility on the 23rd floor of WTC 7 that is intended to serve as a meeting place for city leaders in the event of an act of terrorism or other kind of crisis. [CNN, 6/7/1999; City of New York, 2/18/2001] Office of Emergency Management (OEM) officials activated it shortly after Flight 11 crashed into the North Tower of the WTC (see (Shortly After 8:46 a.m.) September 11, 2001). [Bylicki, 6/19/2003; 9/11 Commission, 7/24/2004, pp. 293]
Staffers Discussed Evacuation after the First Crash - Soon after the crash occurred, officials in the EOC “began discussing with OEM staff whether or not they should evacuate the building,” according to a report by Tricia Wachtendorf of the Disaster Research Center at the University of Delaware. [Wachtendorf, 2004, pp. 77] Richard Rotanz, deputy director of the OEM, and some other officials in the EOC conducted a “threat analysis” after the second hijacked plane crashed into the WTC, at 9:03 a.m. (see 9:03 a.m. September 11, 2001). [Urban Hazards Forum, 1/2002]
Staffers Want to Stay in the Operations Center - Personnel are reluctant to leave the EOC because in it they have “a tremendous amount of resources at their fingertips” and they are “best able to handle an emergency of this scale,” Wachtendorf will later write. Furthermore, there is no clear procedure to move to or establish an alternative operations center if it is abandoned. “I couldn’t think of where we would go if we left the EOC because at that time we didn’t have a backup facility,” one official will recall. There is, in fact, “no formalized evacuation plan for the EOC,” according to Wachtendorf. [Wachtendorf, 2004, pp. 77-79]
OEM Deputy Director Orders the Evacuation - However, Richard Bylicki, a police sergeant assigned to the OEM, was told during a call with the FAA that at least one other plane, in addition to the two that hit the Twin Towers, is unaccounted for and possibly heading for New York (see (9:30 a.m.) September 11, 2001), and he passed this information on to Rotanz. [Bylicki, 6/19/2003] Rotanz was given the same warning by a Secret Service agent who works in WTC 7. [Urban Hazards Forum, 1/2002; 9/11 Commission, 7/24/2004, pp. 305] Based on this information, he “surmised that [WTC 7] was potentially the next target,” Bylicki will recall. He consequently now orders all OEM employees to leave the building. [Bylicki, 6/19/2003; 9/11 Commission, 4/7/2004] A Secret Service agent, presumably the one who told Rotanz about the additional unaccounted-for planes, also reportedly advises EOC personnel to evacuate. He says, “There’s a reported third plane headed toward the East Coast and we’re warning everybody to vacate the building,” Fire Department Captain Abdo Nahmod will recall. [Journal of Emergency Medical Services, 9/2011, pp. 42 pdf file]
Some Liaisons Have Come to the Operations Center - Various city agencies were contacted after the EOC was activated and instructed to send their designated representatives to the center. None of these representatives have arrived by the time the EOC is evacuated, according to the 9/11 Commission Report. [9/11 Commission, 5/18/2004 pdf file; 9/11 Commission, 7/24/2004, pp. 293, 305] However, contradicting this claim, a number of emergency responders will recall arriving at the EOC before it is evacuated, to serve as representatives for their agencies. [City of New York, 10/11/2001; City of New York, 10/25/2001; City of New York, 12/4/2001; Journal of Emergency Medical Services, 9/2011, pp. 42 pdf file]
Staffers Are Initially Slow to Leave - Personnel reportedly do not initially respond to the evacuation order with a sense of urgency. They “calmly collected personal belongings and began removing OEM records,” a report by the Mineta Transportation Institute will state. But they are subsequently “urged to abandon everything and leave the building quickly.” [Jenkins and Edwards-Winslow, 9/2003, pp. 16 pdf file] After evacuating from the EOC, they assemble in the lobby of WTC 7 and await further instructions over radio. [Bylicki, 6/19/2003] Most of them think they are only temporarily abandoning their facility and expect to return to it later in the day. They do not anticipate WTC 7 being affected by fires (see 4:10 p.m. September 11, 2001) and then collapsing late this afternoon (see (5:20 p.m.) September 11, 2001). [Wachtendorf, 2004, pp. 84]
Fire Commissioner Will Be Surprised That the Center Is Evacuated - Fire Commissioner Thomas Von Essen will be surprised when he finds that the EOC has been evacuated, since the center was designed for dealing with a crisis like the one currently taking place. “I thought that was where we should all be because that’s what [it] was built for,” he will comment. He will arrive at WTC 7 looking for Mayor Rudolph Giuliani shortly before 9:59 a.m., when the South Tower collapses (see 9:59 a.m. September 11, 2001). When he learns that the EOC has been evacuated, he will think: “How ridiculous. We’ve got a 13-million-dollar command center and we can’t even use it.” He will say in frustration: “How can we be evacuating OEM? We really need it now.” [Essen, 2002, pp. 26; Fink and Mathias, 2002, pp. 230]
Time of the Evacuation Is Unclear - It is unclear exactly when the EOC is evacuated. The order to evacuate is issued at “approximately 9:30” a.m., according to the 9/11 Commission Report. [9/11 Commission, 7/24/2004, pp. 305] But, according to a report by the National Institute of Standards of Technology, the evacuation occurs slightly later than this, at “approximately 9:44 a.m.” [National Institute of Standards and Technology, 9/2005, pp. 109] Other accounts will suggest it may even have taken place before the second attack on the WTC occurred (see (Soon After 8:46 a.m.-9:35 a.m.) September 11, 2001 and (Shortly Before 9:03 a.m.) September 11, 2001). [Barrett and Collins, 2006, pp. 34; Dylan Avery, 2007] Many people in the rest of WTC 7 left the building earlier on, around the time of the second attack (see (9:03 a.m.) September 11, 2001). [9/11 Commission, 5/18/2004 pdf file; National Institute of Standards and Technology, 9/2005, pp. 109]

Entity Tags: Office of Emergency Management, Richard Bylicki, Thomas Von Essen, Richard Rotanz, Abdo Nahmod, US Secret Service

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Bill Grimes.Bill Grimes. [Source: Lori A. Bultman / US Air Force]Colonel Bill Grimes receives a call in which he is asked about getting the Predator drone, a remotely controlled, unmanned plane, ready to fly over Afghanistan. [Whittle, 2014, pp. 235] Grimes is the director of Big Safari, a highly secretive Air Force program based at Wright-Patterson Air Force Base in Ohio that specializes in modifying standard Air Force aircraft for time-sensitive and highly classified operations. [Defense Update, 5/3/2013; Wired, 12/17/2015] He was in his office at Wright-Patterson this morning when a colleague told him an airplane had crashed into the World Trade Center. He then joined others watching the television coverage of the incident in the conference room next to his office and saw the second hijacked plane crashing into the WTC, at 9:03 a.m. (see 9:03 a.m. September 11, 2001). “Within a few minutes” of the second crash, according to journalist and author Richard Whittle, Grimes is called back to his office to take a call from Lieutenant Colonel Kenneth Johns, who is at Air Force headquarters at the Pentagon. Johns wants to know what needs to be done to get three Predators, and whatever is needed to fly them over Afghanistan, ready to go. But just as the two men start discussing the matter, Johns says he will have to call again later, since the Pentagon is being evacuated. This evacuation is presumably in response to the attack on the Pentagon, which occurs at 9:37 a.m. (see 9:37 a.m. September 11, 2001). Grimes says he will have answers by the time the two men talk again. [Whittle, 2014, pp. 235] He will subsequently call members of his team, and tell them to pack their bags and prepare to deploy. He will instruct them to go to the airfield at Palmdale, California, where a C-17 cargo plane will arrive soon to pick them up. Grimes will later write that he starts calling the members of his team “[m]ere moments after the second airliner crashed into the World Trade Center.” According to Whittle, he starts making the calls “shortly after” the second crash at the WTC. However, if his conversation with Johns occurs around the time of the Pentagon attack, he presumably only starts calling the members of his team after 9:37 a.m. A C-17 will set off tomorrow to fly three Predators, along with members of Grimes’s team, from California to Washington, DC (see September 12-14, 2001). [Whittle, 2011, pp. 25 pdf file; Grimes, 2014, pp. 334-335; Whittle, 2014, pp. 239-240]

Entity Tags: Bill Grimes, Kenneth Johns

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The National Military Command Center (NMCC) at the Pentagon commences an “air threat conference” at 9:37 a.m. in response to the terrorist attacks, which will last for more than eight hours and have numerous high-level government and military officials participating at various times.
NORAD Reports Two More Hijackings - Captain Charles Leidig opens the call at 9:39 a.m. [9/11 Commission, 7/24/2004, pp. 37-38] As the acting deputy director for operations (DDO) in the NMCC during the attacks, Leidig is responsible for moderating the air threat conference and generating a military response to the crisis. [9/11 Commission, 4/29/2004 pdf file] He begins the call saying: “An air attack against North America may be in progress. NORAD, what’s the situation?” NORAD says it has conflicting reports, and its latest information is of “a possible hijacked aircraft taking off out of JFK [International Airport in New York], en route to Washington, DC.” [9/11 Commission, 7/24/2004, pp. 38] NORAD says the FAA has also passed it information about a second additional hijacking. Major Charles Chambers, who is currently on duty in the NMCC, will later recall, “This was probably a communications mix-up, but we all thought for a while that there were a total of five hijackings.” [US Department of Defense, 9/2001]
NMCC Reports Pentagon Attack - The NMCC reports that there has been a crash into the mall side of the Pentagon and requests that the secretary of defense be added to the conference. (However, despite being in the Pentagon when it is hit, Defense Secretary Donald Rumsfeld will not enter the NMCC and join the air threat conference until around 10:30 a.m. (see (10:30 a.m.) September 11, 2001).) [9/11 Commission, 7/24/2004, pp. 38] The air threat conference is broadcast over a loudspeaker inside the NMCC. [US News and World Report, 8/31/2003] According to Chambers, “Questions were flying left and right on the conference, and trying to keep things straight was very difficult.” [US Department of Defense, 9/2001]
NORAD Recommended Air Threat Conference - Leidig and Commander Pat Gardner, the assistant DDO, had earlier on decided to convene an all-purpose “significant event conference” in response to the attacks on the World Trade Center. That call commenced at 9:29 a.m. (see 9:29 a.m.-9:34 a.m. September 11, 2001). NORAD had recommended that it be reconvened as an air threat conference. [9/11 Commission, 4/29/2004 pdf file; 9/11 Commission, 7/24/2004, pp. 37] According to Chambers, an air threat conference is used when aircraft are considered to be hostile and involves many more people than are in a significant event conference, including the chairman of the Joint Chiefs of Staff, the secretary of defense, and officials from the White House. [US Department of Defense, 9/2001] However, Leidig thought a significant event conference was the correct kind of call for the situation. He will tell the 9/11 Commission that an air threat conference “had Cold War implications and brought a different group of people to a conference.” [9/11 Commission, 4/29/2004 pdf file] Gardner will say that threat conferences are intended for dealing with external threats. [9/11 Commission, 5/12/2004]
Deputy Director Ordered Upgrading of Conference - All the same, Leidig gave the order to transition to an air threat conference. [9/11 Commission, 7/24/2004, pp. 37] He will tell the 9/11 Commission that, in retrospect, the reason he thinks he did so “was because he perceived an air threat at that time.” [9/11 Commission, 4/29/2004 pdf file] Therefore, the significant event conference was brought to an end at around 9:34 a.m., and resumes as an air threat conference three minutes later. [9/11 Commission, 7/24/2004, pp. 37] Staff Sergeant Val Harrison could have established the air threat conference either by leaving all of those participating in the significant event conference on the line and then adding new participants one at a time, or by simply hanging up on everyone in the significant event conference and then having the computer do a mass dialing. Harrison recommended the second option. Leidig had agreed, and directed her to disconnect the conference call and start over.
Problem with Connecting Some Agencies - As happened with the significant event conference, there are problems connecting several agencies to the air threat conference. [US Department of Defense, 9/2001] Despite repeated attempts, operators struggle to get the FAA connected (see (9:29 a.m.-12:00 p.m.) September 11, 2001), and it will take until 10:17 a.m. for an FAA representative to finally join the call (see 10:17 a.m. September 11, 2001). [9/11 Commission, 7/21/2003 pdf file; 9/11 Commission, 7/24/2004, pp. 37] Other agencies had not understood what Leidig meant about convening the new conference, and so did not hang up their phones when the NMCC disconnected the previous conference call. As a result, all the NMCC got from them was a busy signal over the line. Chambers will recall, “As with the [significant event conference], it took longer than expected to convene the [air threat conference].” [US Department of Defense, 9/2001]
Top Officials Participate - Throughout the more than eight hours the air threat conference is running for, numerous key officials will participate in it at various times, including President Bush, Vice President Dick Cheney, Deputy National Security Adviser Stephen Hadley, acting Chairman of the Joint Chiefs of Staff Richard Myers, military personnel from the Presidential Emergency Operations Center below the White House, and the president’s military aide on Air Force One. [9/11 Commission, 7/24/2004, pp. 37] Brigadier General Montague Winfield, the original DDO, who had Leidig take his place so he could attend a pre-scheduled meeting (see 8:30 a.m. September 11, 2001), will later recall, “All of the governmental agencies… that were involved in any activity that was going on in the United States… were in that conference.” [ABC News, 9/11/2002]
Winfield Runs Conference after Returning to Post - Winfield will take over the running of the air threat conference from Leidig after returning to his post at around 10:30 a.m. (see (10:30 a.m.) September 11, 2001). [CNN, 9/4/2002; 9/11 Commission, 4/29/2004 pdf file; 9/11 Commission, 6/17/2004] But although NMCC conference calls are moderated by the DDO, Rumsfeld will use the DDO’s phone to participate in the air threat conference, meaning that Winfield is unable to moderate the conference when the defense secretary is participating. [9/11 Commission, 7/21/2003 pdf file]

Entity Tags: Charles Leidig, Federal Aviation Administration, Montague Winfield, Charles Chambers, Patrick Gardner, North American Aerospace Defense Command, National Military Command Center, Val Harrison

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Secret Service executives implement an “emergency call-up” of all their agency’s personnel at some time after 9:37 a.m., when the Pentagon was hit, according to US News and World Report. The reason why the Secret Service did not call up all its personnel earlier on is unstated, as is the reason it decides to do so now. [US News and World Report, 12/1/2002] The Secret Service is responsible for protecting the nation’s “most visible targets,” including the president, the vice president, and the White House complex. [US Department of the Treasury, 5/8/2001; Office of Management and Budget, 7/2001, pp. 82 pdf file] Brian Stafford, the agency’s director, realized the US was under attack after the second plane hit the World Trade Center at 9:03 a.m. (see 9:03 a.m. September 11, 2001), and then activated the Director’s Crisis Center at Secret Service headquarters to manage the agency’s response (see (Shortly After 9:03 a.m.) September 11, 2001). [United States Secret Service, 10/1/2001; Peter Schnall, 10/24/2004] And since around 9:18 a.m., a meeting has been taking place in the office of Carl Truscott, the special agent in charge of the presidential protective division, during which Truscott and three other senior Secret Service agents have discussed security enhancements at the White House (see (9:18 a.m.) September 11, 2001). [United States Secret Service, 10/1/2001]

Entity Tags: US Secret Service

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The Flight 93 hijackers (probably inadvertently) transmit over the radio: “Hi, this is the captain. We’d like you all to remain seated. There is a bomb on board. And we are going to turn back to the airport. And they had our demands, so please remain quiet.” [Boston Globe, 11/23/2001; Longman, 2002, pp. 209; MSNBC, 9/3/2002; 9/11 Commission, 6/17/2004] The controller responds, “United 93, understand you have a bomb on board. Go ahead,” but there is no response. There was a very similar “bomb on board” warning from the same flight at 9:32 a.m. (see (9:32 a.m.) September 11, 2001). The 9/11 Commission indicates that these are separate incidents. [9/11 Commission, 6/17/2004] Cleveland flight control apparently continues to wait for FAA superiors to notify NORAD. Earlier in the morning, Boston flight control directly contacted NORAD (see (8:37 a.m.) September 11, 2001) and local air force bases when they determined Flight 11 was hijacked.

Entity Tags: North American Aerospace Defense Command, Cleveland Air Route Traffic Control Center, Federal Aviation Administration

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Alice Hoglan, the mother of Mark Bingham, a passenger on Flight 93, informs the FBI that her son has just phoned her from the plane, and then calls Bingham’s cell phone and leaves two voicemail messages. [Federal Bureau of Investigation, 9/17/2001; Barrett, 2002, pp. 157-158] Alice Hoglan is currently staying at the home of her brother, Vaughn Hoglan, and his wife in Saratoga, California. [Longman, 2002, pp. 129; San Francisco Chronicle, 9/10/2003] Bingham has just called her and told her his flight was taken over by three men who said they had a bomb, but the call got broken off after less than three minutes (see (9:37 a.m.) September 11, 2001). [Federal Bureau of Investigation, 9/11/2001; 9/11 Commission, 5/13/2004 pdf file; 9/11 Commission, 8/26/2004, pp. 41, 99]
Bingham's Mother Realizes Flight 93 Will Likely Crash - No one in the Hoglan household was aware of the terrorist attacks in New York and at the Pentagon. But after the call from Bingham ends, Vaughn Hoglan switches on the television to see if there is any news about Flight 93 and the family sees, for the first time, the recorded footage of Flight 175 crashing into the World Trade Center (see 9:03 a.m. September 11, 2001). [BBC, 12/2001; Barrett, 2002, pp. 157] Alice Hoglan then realizes the hijacking of Flight 93 is part of a “grand and ugly scheme,” and that her son’s plane will likely crash, too. [San Francisco Chronicle, 1/28/2005; San Jose Mercury News, 9/10/2011]
Bingham's Mother Tells the FBI about the Hijacking - Being a flight attendant with United Airlines, she calls her airline to ask about her son’s plane. [Los Gatos Patch, 8/25/2011] However, she will later recall, all she gets is a recorded message, which states, “United Flight 93 left Newark at 8:01 a.m. and will arrive San Francisco, Gate 82, at 11:19 a.m.” [BBC, 12/2001] She also calls 9-1-1 to report what has happened. She is put through to the San Francisco division of the FBI and speaks to an agent there. [Federal Bureau of Investigation, 9/17/2001] The agent asks her a series of questions about the hijackers on Flight 93, but she is unable to answer them.
Bingham's Mother Leaves Messages for Her Son - Alice Hoglan then tries calling her son twice on his cell phone, intending to let him know the full scale of the attack that his plane’s hijacking is part of. On both occasions, she has to leave messages on his voicemail. She makes the first call at 9:54 a.m. (Because she is flustered, she miscalculates the East Coast time by an hour during the call and also mistakenly says Flight 93 might be used as a “target” rather than as a “weapon.”) She says: “Mark, this is your mom. It’s 10:54 a.m. [Eastern Time]. The news is that it’s been hijacked by terrorists. They are planning to probably use the plane as a target to hit some site on the ground. So, if you possibly can, try to overpower these guys if you can, ‘cause they will probably use the plane as a target. I would say go ahead and do everything you can to overpower them, because they’re hellbent. Try to call me back if you can. You know the number here. Okay, I love you sweetie. Bye.” A minute or so later she calls Bingham’s cell phone again and leaves a second, similar message. Among other things, she urges her son to “group some people and perhaps do the best you can to get control of [the plane].” [Barrett, 2002, pp. 157-158; San Jose Mercury News, 9/10/2011; McMillan, 2014, pp. 122] Bingham will never receive these messages. [ABC News, 3/30/2002] His plane will crash in a field in Pennsylvania at 10:03 a.m. (see (10:03 a.m.-10:10 a.m.) September 11, 2001 and (10:06 a.m.) September 11, 2001). [9/11 Commission, 7/24/2004, pp. 14, 30]

Entity Tags: Federal Bureau of Investigation, Mark Bingham, Alice Hoglan, United Airlines, Vaughn Hoglan

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Doug Davis.Doug Davis. [Source: Federal Aviation Administration]John White, a manager at the FAA’s Command Center, suggests to Doug Davis, the special assistant for technical operations in air traffic services at FAA headquarters, that fighter jets should be launched in response to Flight 93. However, FAA headquarters is apparently unable to act on this suggestion. [Federal Aviation Administration, 10/21/2002; 9/11 Commission, 7/24/2004, pp. 29; Canadian Broadcasting Corporation, 9/10/2006] In the last few minutes, the Command Center has warned headquarters that Flight 93 is “29 minutes out of Washington” and approaching the city (see 9:41 a.m.-9:48 a.m. September 11, 2001). [9/11 Commission, 8/26/2004, pp. 44]
Command Center Asks about Launching Fighters - Davis now tells White, “They’re pulling Jeff [Griffith, the FAA’s deputy director of air traffic] away to go talk about United 93.” White asks, “Uh, do we want to think, uh, about scrambling aircraft?” Davis replies, “Oh, God, I don’t know.” White says, “Uh, that’s a decision somebody’s gonna have to make probably in the next 10 minutes.” However, Davis only responds, “Uh, ya know everybody just left the room.” [Federal Aviation Administration, 10/21/2002; 9/11 Commission, 7/24/2004, pp. 29] This conversation takes place 13 minutes after the FAA’s Cleveland Center asked the Command Center whether anyone had asked the military to launch fighter jets to intercept Flight 93 (see (9:36 a.m.) September 11, 2001). [9/11 Commission, 8/26/2004, pp. 40]
Person Who Could Request Fighters Is Unavailable - Apparently there is only one person at FAA headquarters who is authorized to request military assistance, and Ben Sliney, the Command Center’s national operations manager, is told that no one can find him. Sliney will later recount: “I said something like, ‘That’s incredible. There’s only one person. There must be someone designated or someone who will assume the responsibility of issuing an order, you know.’ We were becoming frustrated in our attempts to get some information. What was the military response?” [Canadian Broadcasting Corporation, 9/10/2006] This lack of response to Flight 93 contrasts with the FAA’s earlier reaction to Flight 11, when Boston Center air traffic controllers contacted NORAD’s Northeast Air Defense Sector (NEADS) themselves (see (8:37 a.m.) September 11, 2001), and even called military bases directly (see 8:34 a.m. September 11, 2001 and (8:34 a.m.) September 11, 2001). [9/11 Commission, 7/24/2004, pp. 20]

Entity Tags: Ben Sliney, John White, Doug Davis, Federal Aviation Administration

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Acting Chairman of the Joint Chiefs of Staff Richard Myers enters the National Military Command Center (NMCC) within the Pentagon, though exactly when this happens remains unclear. According to his own statements, he was on Capitol Hill, in the offices of Senator Max Cleland (D-GA), from just before 9:00 a.m. until around the time the Pentagon was hit. He’d then headed back to the Pentagon (see Shortly Before 9:00 a.m. September 11, 2001 and (Shortly After 9:37 a.m.) September 11, 2001). [Armed Forces Radio And Television Service, 10/17/2001; MSNBC, 9/11/2002; Council on Foreign Relations, 6/29/2006] According to the 9/11 Commission, Myers joins the air threat conference call from the NMCC at “shortly before 10:00.” [9/11 Commission, 7/24/2004, pp. 38] But the American Forces Press Service reports that he arrives at the NMCC “about 15 minutes” before Secretary of Defense Donald Rumsfeld (who arrives around 10:30), meaning at about 10:15 a.m. [American Forces Press Service, 9/8/2006] Rumsfeld claims that, as he enters the NMCC, Myers has “just returned from Capitol Hill.” [9/11 Commission, 3/23/2004] Cleland verifies that Myers was with him on Capitol Hill until around the time of the Pentagon attack. [CNN, 11/20/2001; Atlanta Journal-Constitution, 6/16/2003] But counterterrorism “tsar” Richard Clarke claims that Myers has been taking part in a video conference since shortly after the second attack on the WTC, and has been visible on the Pentagon screen (see (9:10 a.m.) September 11, 2001 and 9:28 a.m. September 11, 2001), thereby implying Myers has been at the Pentagon all along. [Clarke, 2004, pp. 3 and 5] Myers tells the 9/11 Commission, “After I reached the National Military Command Center (NMCC), I asked questions to determine where Secretary Rumsfeld was, how the FAA was handling airborne flights, and the status of fighters prepared to intercept any hijacked aircraft inbound to Washington.” [9/11 Commission, 6/17/2004 pdf file]

Entity Tags: Richard B. Myers, National Military Command Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The South Tower of the World Trade Center collapses.The South Tower of the World Trade Center collapses. [Source: Associated Press]The South Tower of the World Trade Center tilts to the southeast and then collapses. It was hit by Flight 175 at 9:03 a.m., 56 minutes earlier (see 9:03 a.m. September 11, 2001). [Washington Post, 9/12/2001; New York Times, 9/12/2001; MSNBC, 9/22/2001; USA Today, 12/20/2001; Associated Press, 8/21/2002; ABC News, 9/11/2002; National Institute of Standards and Technology, 9/2005, pp. 44] The first sign of the collapse is visible on floor 82. [National Institute of Standards and Technology, 9/2005, pp. 87] The angle of the tilt will be disputed after 9/11 (see September-November 2005), as will the time it takes the towers to fall to the ground (see September 12, 2001-September 2005). [Scientific American, 10/9/2001; Eagar and Musso, 12/2001; PBS Nova, 5/2002; National Institute of Standards and Technology, 8/30/2006]

Entity Tags: World Trade Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Twenty minutes after the 9/11 attacks in New York (see 8:46 a.m. September 11, 2001 and 9:03 a.m. September 11, 2001) and Washington (see 9:37 a.m. September 11, 2001), a bomb truck is stationed in downtown Oklahoma City, in preparation for any potential bombing related to the 1995 Oklahoma City bombing (see 8:35 a.m. - 9:02 a.m. April 19, 1995). Additionally, an Oklahoma County Sheriff’s Department command post is activated where convicted bombing conspirator Terry Nichols (see September 5, 2001) is being held. [The Oklahoman, 4/2009]

Entity Tags: Terry Lynn Nichols

Timeline Tags: Complete 911 Timeline, US Domestic Terrorism

General Henry Shelton, the chairman of the Joint Chiefs of Staff, talks over the phone with General Richard Myers, the vice chairman of the Joint Chiefs of Staff, who is at the Pentagon, and is given information about the Pentagon attack and the military’s response to the terrorist attacks. Shelton took off at 7:15 a.m. to fly to Europe for a NATO conference (see 7:15 a.m. September 11, 2001). He learned of the attacks in New York while his plane was over the Atlantic Ocean, and has just been told of a “big explosion at the Pentagon” (see (8:50 a.m.-10:00 a.m.) September 11, 2001).
First Report Is of a Hand Grenade Going Off at Pentagon - Shelton heads to the communications console just behind the plane’s cockpit. From there, he talks over a secure, encrypted phone line with Myers, who is in the National Military Command Center (NMCC) at the Pentagon. Myers updates Shelton on what is known about the explosion at the Pentagon. He says the first report is that a hand grenade went off in the Pentagon parking lot.
Myers Updates Shelton on Military Response to Attacks - Myers then gives Shelton a complete status report. He says: “We’ve transitioned the SIEC [significant event conference] into an air threat conference call, which is in progress as we speak (see 9:29 a.m.-9:34 a.m. September 11, 2001 and 9:37 a.m.-9:39 a.m. September 11, 2001). FAA has requested that NORAD take over control of US airspace. Fighters have scrambled to escort Air Force One (see (After 9:56 a.m.) September 11, 2001) and we’re sending AWACS up to provide further monitoring (see Before 9:55 a.m. September 11, 2001). We’ve escalated to Threatcon Delta and are about to launch the NAOC [National Airborne Operations Center plane]. Bases around the world are locked tight, [Deputy Secretary of Defense Paul] Wolfowitz has been relocated to Site R (see (11:00 a.m.) September 11, 2001), plus, [Deputy National Security Adviser Stephen] Hadley has requested we implement full ‘Continuity of Government measures’ (see 9:59 a.m. September 11, 2001), and we are proceeding along those lines.”
Myers Says Plane Hit the Pentagon - Myers is then interrupted by some commotion in the background. When he returns to the line, he tells Shelton, “Okay, we just got the word: the prior report was incorrect; it was not a hand grenade that exploded, it was another commercial airline that struck the Pentagon.” He then continues with his status report, saying, “[P]er the president, we’ve gone weapons free in the event of a hijacked aircraft or one that threatens the White House.” [Giesemann, 2008, pp. 20, 22-24; Shelton, Levinson, and McConnell, 2010, pp. 430-433]
Shelton Wants to Return to Washington - Myers will tell the 9/11 Commission that after he arrives at the NMCC—presumably referring to the time of this phone call—he “recommended General Shelton return to Washington, DC.” [9/11 Commission, 6/17/2004 pdf file] But Shelton will recall that he tells Myers, “I need you to call Ed Eberhart [General Ralph Eberhart, the commander of NORAD] at NORAD and let him know that we’re coming back [to Washington] on Speckled Trout [the nickname of the plane he is on], and tell him that I would consider it a personal favor if he would see to it that the chairman and his crew are not shot down on their way back to Andrews.” Myers confirms, “Will do.” According to Shelton, his plane is called back 10 minutes later “with confirmation that we had been officially cleared to fly through the shutdown airspace.” [Shelton, Levinson, and McConnell, 2010, pp. 433] But according to Captain Rob Pedersen, the flight navigator on Shelton’s plane, it is several hours before the plane is cleared to enter the US airspace (see (After 9:45 a.m.) September 11, 2001). [Air Force Magazine, 9/2011 pdf file] The plane will therefore only land at Andrews Air Force Base, near Washington, at 4:40 p.m. (see 4:40 p.m. September 11, 2001) and Shelton will only arrive at the NMCC an hour after that (see 5:40 p.m. September 11, 2001). [Federal Aviation Administration, 9/11/2001 pdf file; Myers, 2009, pp. 159] The exact time of the call between Shelton and Myers is unclear, though it would be at some time after about 10:00 a.m., when Myers arrives at the NMCC (see (Between 9:55 a.m. and 10:25 a.m.) September 11, 2001). [9/11 Commission, 2/17/2004 pdf file; 9/11 Commission, 7/24/2004, pp. 38]

Entity Tags: Rob Pedersen, Henry Hugh Shelton, Richard B. Myers

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Smoke rising, minutes after Flight 93 crashes in Pennsylvania.Smoke rising, minutes after Flight 93 crashes in Pennsylvania. [Source: CNN]Exactly when Flight 93 crashes is unclear. According to NORAD, Flight 93 crashes at 10:03 a.m. [North American Aerospace Defense Command, 9/18/2001] The 9/11 Commission gives an exact time of 11 seconds after 10:03 a.m. It will claim this “time is supported by evidence from the staff’s radar analysis, the flight data recorder, NTSB [National Transportation Safety Board] analysis, and infrared satellite data.” It does note that “[t]he precise crash time has been the subject of some dispute.” [9/11 Commission, 6/17/2004] However, a seismic study authorized by the US Army and drafted by scientists Won-Young Kim and Gerald Baum to determine when the plane crashed will conclude that the crash happened at 10:06:05 a.m. [Kim and Baum, 2002 pdf file; San Francisco Chronicle, 12/9/2002] The discrepancy is so puzzling that the Philadelphia Daily News will publish an article on the issue, titled “Three-Minute Discrepancy in Tape.” This notes that leading seismologists agree on the 10:06 a.m. time, give or take a couple of seconds. [Philadelphia Daily News, 9/16/2002] The New York Observer will note that, in addition to the seismology study, “The FAA gives a crash time of 10:07 a.m. In addition, the New York Times, drawing on flight controllers in more than one FAA facility, put the time at 10:10 a.m. Up to a seven-minute discrepancy? In terms of an air disaster, seven minutes is close to an eternity. The way our nation has historically treated any airline tragedy is to pair up recordings from the cockpit and air traffic control and parse the timeline down to the hundredths of a second. However, as [former Inspector General of the Transportation Department] Mary Schiavo points out, ‘We don’t have an NTSB (National Transportation Safety Board) investigation here, and they ordinarily dissect the timeline to the thousandth of a second.’” [New York Observer, 2/15/2004]

Entity Tags: 9/11 Commission, North American Aerospace Defense Command, Federal Aviation Administration, Won-Young Kim, Mary Schiavo, Gerald R. Baum

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Flight 93 crashed in the Pennsylvania countryside. Resue vehicles arrive in the distance.Flight 93 crashed in the Pennsylvania countryside. Resue vehicles arrive in the distance. [Source: Keith Srakocic/ Associated Press]Flight 93 crashes into an empty field just north of the Somerset County Airport, about 80 miles southeast of Pittsburgh, 124 miles or 15 minutes from Washington, D.C. Presumably, hijackers Ziad Jarrah, Ahmed Alhaznawi, Ahmed Alnami, Saeed Alghamdi, and all the plane’s passengers are killed instantly. [CNN, 9/12/2001; North American Aerospace Defense Command, 9/18/2001; Guardian, 10/17/2001; Pittsburgh Post-Gazette, 10/28/2001; USA Today, 8/12/2002; Associated Press, 8/21/2002; MSNBC, 9/3/2002] The point of impact is a reclaimed coal mine, known locally as the Diamond T Mine, that was reportedly abandoned in 1996. [Pittsburgh Tribune-Review, 9/12/2001; St. Petersburg Times, 9/12/2001; Pittsburgh Tribune-Review, 9/11/2002] Being “reclaimed” means the earth had been excavated down to the coal seam, the coal removed, and then the earth replaced and planted over. [Kashurba, 2002, pp. 121] A US Army authorized seismic study times the crash at five seconds after 10:06 a.m. [Kim and Baum, 2002 pdf file; San Francisco Chronicle, 12/9/2002] As mentioned previously, the timing of this crash is disputed and it may well occur at 10:03 a.m., 10:07 a.m., or 10:10 a.m.

Entity Tags: San Francisco Chronicle, Ziad Jarrah, Ahmed Alhaznawi, Saeed Alghamdi, NBC, Ahmed Alnami

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

A lieutenant colonel at the White House repeatedly relays to the National Military Command Center (NMCC) at the Pentagon that Vice President Dick Cheney has confirmed that fighter jets are cleared to engage an inbound aircraft if they can verify that the aircraft is hijacked. The lieutenant colonel notifies the NMCC of the authorization over the air threat conference call (see 9:29 a.m.-9:34 a.m. September 11, 2001). Cheney, who is in the Presidential Emergency Operations Center (PEOC) below the White House, said at sometime between 10:10 and 10:15 that fighters could engage an aircraft that was reportedly approaching Washington (see (Between 10:10 a.m. and 10:15 a.m.) September 11, 2001). However, it is only when Cheney calls President Bush at 10:18 a.m. that Bush confirms the shootdown order (see 10:18 a.m.-10:20 a.m. September 11, 2001). The shootdown order will be received by NORAD, and then, at 10:31 a.m., sent out to its three air defense sectors in the continental US (see 10:31 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 41-42; Spencer, 2008, pp. 240]

Entity Tags: National Military Command Center, Richard (“Dick”) Cheney

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

A representative of the FAA finally joins an emergency teleconference being conducted by the National Military Command Center (NMCC) at the Pentagon, after NMCC personnel have repeatedly been unable to connect the FAA to the conference. In response to the terrorist attacks, the NMCC began a “significant event conference” at 9:29 a.m., to gather and disseminate information from government agencies (see 9:29 a.m.-9:34 a.m. September 11, 2001), and eight minutes later upgraded this to an “air threat conference” (see 9:37 a.m.-9:39 a.m. September 11, 2001). However, according to the 9/11 Commission Report, because of “equipment problems and difficulty finding secure phone numbers,” operators at the NMCC have been unable to connect the FAA to the conference (see (9:29 a.m.-12:00 p.m.) September 11, 2001). [9/11 Commission, 7/21/2003 pdf file; 9/11 Commission, 7/24/2004, pp. 37]
FAA Representative Has 'No Situational Awareness' - The air threat conference is now joined by FAA employee Rayford Brooks. [9/11 Commission, 7/24/2004, pp. 463] Brooks is on duty in the Central Altitude Reservation Function (CARF) at the FAA’s Command Center in Herndon, Virginia. This office is responsible for processing and separating altitude reservations, and coordinates military requests for priority airspace activity with FAA facilities and international agencies. [9/11 Commission, 4/5/2004; 9/11 Commission, 4/15/2004] However, Brooks has “no familiarity with or responsibility for hijackings, no access to decisionmakers, and none of the information available to senior FAA officials,” according to the 9/11 Commission Report. [9/11 Commission, 7/24/2004, pp. 37] Brooks will later recall having had “no situational awareness” of the current crisis. He only arrived at the Command Center at around 9:30 a.m. and had not been listening to the radio while driving to work. Those on the Command Center floor have not given him any instructions regarding the NMCC conference or other operational matters.
Brooks on Conference instead of Military Cell Officer - Brooks will tell the 9/11 Commission that the Air Traffic Services Cell (ATSC)—a small office located next to the CARF at the Command Center, manned by military reservists (see (Between 9:04 a.m. and 9:25 a.m.) September 11, 2001)—has asked the CARF to monitor the NMCC’s air threat conference on its behalf for three or four hours, because the ATSC does not have a working STU-III secure phone. [9/11 Commission, 4/15/2004] (A chronology of the ATSC’s actions on this day will state that the keys for the ATSC’s secure phones are recalibrated at some point, and these phones then “worked fine.” [US Air Force, 9/11/2001] )
NORAD and FAA Leaders out of Contact - Three times before 10:03 a.m., when the last hijacked plane reportedly crashed (see (10:03 a.m.-10:10 a.m.) September 11, 2001), NORAD asked for confirmation of the FAA’s presence on the NMCC’s conference, so the FAA could provide an update on the hijackings, but the FAA had not been connected at those times. As a result of the FAA’s absence from the conference, the leaders of NORAD and the FAA have effectively been out of contact with each other. [9/11 Commission, 6/17/2004; 9/11 Commission, 7/24/2004, pp. 37-38]
FAA's Absence Caused Confusion over Identities of Hijacked Planes - General Richard Myers, the acting chairman of the Joint Chiefs of Staff, will later write that the lack of communication between the NMCC and the FAA has contributed to confusion at the NMCC over the flight numbers of the aircraft that were hijacked. However, according to Myers, the NMCC could not contact the FAA over ordinary phone lines because “[t]errorists who could hijack aircraft so readily could probably also eavesdrop on unsecured phone lines.” [Myers, 2009, pp. 153]

Entity Tags: Air Traffic Services Cell, Richard B. Myers, Federal Aviation Administration, National Military Command Center, Rayford Brooks

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Brigadier General Montague Winfield finally returns to his post as the deputy director for operations (DDO) in the National Military Command Center (NMCC) at the Pentagon, after leaving a colleague, who only recently qualified to take over the position, to stand in for him throughout the terrorist attacks. [9/11 Commission, 4/29/2004 pdf file; 9/11 Commission, 6/17/2004] At 8:30 a.m. Winfield left his post to attend a pre-scheduled meeting that was unrelated to the morning’s attacks and had been convened by the Air Force. Since that time, Captain Charles Leidig has replaced him as the DDO (see 8:30 a.m. September 11, 2001). Leidig, the deputy for Command Center operations, only qualified to stand in as the DDO in the NMCC about a month ago. Even though officers in the NMCC realized the US was under terrorist attack when the second plane hit the World Trade Center at 9:03 a.m., Winfield did not return to his post at that time (see (Shortly After 9:03 a.m.) September 11, 2001). [9/11 Commission, 7/21/2003 pdf file; 9/11 Commission, 4/29/2004 pdf file; 9/11 Commission, 6/17/2004 pdf file]
Winfield Returns to His Post, but Timing Unclear - Now Winfield finally relieves Leidig and resumes his duties as DDO. This happens after Flight 93 has crashed in Pennsylvania (see (10:03 a.m.-10:10 a.m.) September 11, 2001 and (10:06 a.m.) September 11, 2001), although the exact time is unclear. In a private interview with the 9/11 Commission, Leidig will say he is “certain that Winfield returned [from the meeting] after the Pentagon was hit” at 9:37 a.m. (see 9:37 a.m. September 11, 2001), but he “is not certain of Winfield’s arrival in relationship with the vice chairman” of the Joint Chiefs of Staff, General Richard Myers. [9/11 Commission, 4/29/2004 pdf file] (According to the 9/11 Commission Report, Myers arrived at the NMCC shortly before 10:00 a.m. (see (Between 9:55 a.m. and 10:25 a.m.) September 11, 2001). [9/11 Commission, 7/24/2004, pp. 38] ) Winfield then takes over as DDO “at some point in relation to the report of the Pennsylvania crash,” according to Leidig. As the 9/11 Commission will point out, since the crash of Flight 93 happened around 10:03 a.m., “any reporting would be after that time.” [9/11 Commission, 4/29/2004 pdf file] During a public hearing of the 9/11 Commission, Leidig will similarly say that Winfield takes over from him “[r]ight after we resolved what was going on with United 93.” He will also say that a report over the NMCC’s air threat conference at 10:37 a.m., about an anonymous threat against Air Force One (see (10:32 a.m.) September 11, 2001), occurs “right after I was relieved on the watch by General Winfield.” [9/11 Commission, 6/17/2004] This would indicate that Winfield takes over from Leidig at around 10:30 a.m.
Unclear If Winfield Returns to Post Immediately after Meeting - It is also unclear whether Winfield returns to his position as DDO immediately after leaving the Air Force-convened meeting, or he allowed Leidig to continue in his place even while he was available to resume his duties. A 9/11 Commission memorandum will state, “Winfield transitioned into the position [of DDO] upon his return to the NMCC,” following the meeting. [9/11 Commission, 7/21/2003 pdf file] Leidig will recall that he “looked up at one point and General Winfield was standing next to him.” He will also recall that Myers “looked at him at one time and realized the coordinator [i.e. the DDO] was not a general as the position called for, and asked who the general or admiral was that had duty that day.” The guidance that was subsequently given was “to get General Winfield briefed up and in the chair.”
Leidig Listens to Conference before Returning to Post - After Winfield returns to his position as DDO, Leidig initially “stands next to him and listens to the [NMCC’s air threat] conference.” Leidig will then transition into his regular job, which involves making sure the NMCC operates properly, and start dealing with the smoke coming into the center and other issues effecting operations there. [9/11 Commission, 4/29/2004 pdf file]

Entity Tags: Montague Winfield, National Military Command Center, Charles Leidig

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Will Chandler.Will Chandler. [Source: National Geographic]Vice President Dick Cheney phones President Bush and tells him the White House has received a credible threat against Air Force One. [Sammon, 2002, pp. 106-107; Woodward, 2002, pp. 18; CBS News, 9/11/2002] The White House has just received an anonymous phone call in which the caller said the president’s plane would be the next terrorist target (see (10:30 a.m.) September 11, 2001). [Woodward, 2002, pp. 18; 9/11 Commission, 7/24/2004, pp. 554] The caller referred to the plane as “Angel,” which is the Secret Service’s code name for Air Force One. [Fleischer, 2005, pp. 141-142] Details of the call were passed on to government officials, including Cheney, in the Presidential Emergency Operations Center (PEOC) below the White House. [White House, 11/19/2001; Newsweek, 12/30/2001; 9/11 Commission, 7/24/2004, pp. 554]
Cheney Tells Bush about a 'Credible' Threat - Cheney now tells Bush: “We’re getting reports of a threat against you. It appears credible,” Major Robert Darling of the White House Military Office, who is with Cheney in the PEOC, will later recall. Cheney says, “We’re scrambling fighter escorts and the Secret Service is taking internal precautions on board Air Force One.” [Darling, 2010, pp. 61] Bush turns to Lieutenant Colonel Thomas Gould, his military aide, and passes on the news, saying, “A call came into the White House switchboard saying, ‘Angel is next.’” Bush then continues talking with Cheney and says, “We’re at war, Dick, and we’re going to find out who did this and we’re going to kick their ass.” [Sammon, 2002, pp. 107; Fleischer, 2005, pp. 141-142]
Pilot Is Told of the Threat and Asks for a Guard at the Cockpit Door - Colonel Mark Tillman, the pilot of Air Force One, is told about the threat. [CBS News, 9/11/2002] Noting that “Angel” is “a classified call sign of Air Force One,” Tillman will comment that “the only people that knew that call sign was us, [the] Secret Service, and the staff.” Therefore, he will say, “for somebody [to] call into the White House and say that Angel was next, that was just incredible.” [US Air Force, 2/29/2012 pdf file] “It was serious before that, but now… no longer is it a time to get the president home,” Tillman will comment. “We actually have to consider everything we say. Everything we do could be intercepted and we have to make sure that no one knows what our position is.” Tillman asks to have an armed guard at his cockpit door. Will Chandler, the chief of security, is therefore summoned to the front of the plane and stands watch at the base of the stairs leading to the cockpit. No one is then allowed up these stairs. Secret Service agents double-check the identity of everyone on the plane, while the crew reviews the emergency evacuation plan. [CBS News, 9/11/2002; Politico Magazine, 9/9/2016]
Threat Influences the Decision to Fly to Nebraska - White House press secretary Ari Fleischer, who is on Air Force One with Bush, will say the threat against the president’s plane is what leads to the decision to take Bush to Offutt Air Force Base in Nebraska (see 2:50 p.m. September 11, 2001) and is also one of the reasons why Bush does not head back to Washington, DC, right away. [White House, 9/12/2001] However, during the afternoon, the Secret Service will determine that the reported threat was unfounded. [9/11 Commission, 7/24/2004, pp. 554] Shortly after Bush learns about the threat, Tillman will be informed that an aircraft that may have been hijacked is heading toward Air Force One (see (10:35 a.m.) September 11, 2001). [CBS News, 9/11/2002; CBS News, 1/17/2009] White House chief of staff Andrew Card will say he in fact learned a threat had been made against Air Force One almost an hour earlier, while he was being driven with Bush to Sarasota-Bradenton International Airport (see (Between 9:35 a.m. and 9:43 a.m.) September 11, 2001). [White House, 8/12/2002; White House, 8/16/2002; White House, 8/16/2002]

Entity Tags: Mark Tillman, Ari Fleischer, Richard (“Dick”) Cheney, George W. Bush, Robert J. Darling, US Secret Service, Will Chandler, Thomas Gould

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Vice President Dick Cheney tries to bring Defense Secretary Donald Rumsfeld up to date over the National Military Command Center’s (NMCC) conference call (see 9:29 a.m.-9:34 a.m. September 11, 2001), as Rumsfeld arrived at the NMCC just minutes earlier (see (10:30 a.m.) September 11, 2001). Cheney explains that he has given authorization for hijacked planes to be shot down and that this has been passed on to the fighter pilots. Rumsfeld asks, “So we’ve got a couple of aircraft up there that have those instructions at the present time?” Cheney replies: “That is correct. And it’s my understanding they’ve already taken a couple of aircraft out.” Then Rumsfeld says: “We can’t confirm that. We’re told that one aircraft is down but we do not have a pilot report that they did it.” Cheney is incorrect about his authorization having reached the pilots (see 10:31 a.m. September 11, 2001). [9/11 Commission, 6/17/2004]

Entity Tags: Richard (“Dick”) Cheney, Donald Rumsfeld

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

United Airlines issues a press release confirming that Flight 93 has crashed. Flight 93 went down in Pennsylvania shortly after 10:00 a.m. (see (10:06 a.m.) September 11, 2001). The release states: “United Airlines has confirmed one of its flights has crashed near Pittsburgh, Pennsylvania. United Flight 93, a Boeing 757 aircraft, is the flight number involved. The flight originated in Newark and was bound for San Francisco.” The release adds, “United is deeply concerned about a further flight, United Flight 175, a Boeing 767, which was bound from Boston to Los Angeles.” [United Airlines, 9/11/2001] Although Flight 175 hit the World Trade Center at 9:03 (see 9:03 a.m. September 11, 2001), United Airlines will not publicly confirm it has crashed until 11:53 a.m. (see 11:53 a.m. September 11, 2001).

Entity Tags: United Airlines

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

United Airlines finally issues a press release confirming that Flight 175 has crashed, nearly three hours after this aircraft hit the World Trade Center (see 9:03 a.m. September 11, 2001). The release states, “United Airlines has now confirmed that two of its aircraft have crashed.” These include “United Flight 175, a Boeing 767 aircraft, [that] departed from Boston at 7:58 a.m. local time, bound for Los Angeles, with 56 passengers onboard, two pilots and seven flight attendants.” [United Airlines, 9/11/2001] United Airlines previously issued a press release, at 11:17, confirming the crash of Flight 93 (see 11:17 a.m. September 11, 2001), but this had stated that the airline was, at that time, only “deeply concerned” about Flight 175. [United Airlines, 9/11/2001] However, at 9:22, the United Airlines System Operations Control manager had issued an advisory to all the airline’s facilities, stating that Flight 175 had been in an accident in New York (see 9:22 a.m. September 11, 2001). [9/11 Commission, 8/26/2004, pp. 26] And Colin Scoggins, the military liaison at the FAA’s Boston Center, will later claim that United confirmed to the center that Flight 175 was down, “within two or three minutes” (see (9:06 a.m.) September 11, 2001). [Vanity Fair, 8/1/2006]

Entity Tags: United Airlines

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

A US Airways airliner.A US Airways airliner. [Source: Public domain]A US Airways plane that is flying to the United States from Madrid, Spain, is incorrectly suspected of being hijacked. [Federal Aviation Administration, 9/11/2001; White House, 10/24/2001] It is stated over an FAA teleconference that the White House has reported this suspicious aircraft, which is heading to Philadelphia International Airport, and the military is scrambling fighter jets in response to it. [Federal Aviation Administration, 1/2/2002] NORAD’s Northeast Air Defense Sector (NEADS) was alerted to the plane by US Customs and the FBI, according to a NORAD representative on the Pentagon’s air threat conference call (see 9:37 a.m.-9:39 a.m. September 11, 2001). NORAD has been unable to locate the aircraft on radar, according to the NORAD representative. [US Department of Defense, 9/11/2001] Accounts conflict over whether the plane is US Airways Flight 930 or Flight 937. [Federal Aviation Administration, 9/2001; Federal Aviation Administration, 9/11/2001; Federal Aviation Administration, 1/2/2002]
Plane Is Reportedly Transmitting the Hijack Signal - Lewis Libby, Vice President Dick Cheney’s chief of staff, who is in the Presidential Emergency Operations Center (PEOC) below the White House, will later recall that when those in the PEOC learn of the suspect flight, “we got word that it was only 30 minutes or so outside of US airspace.” According to Libby, the plane’s transponder is transmitting the code for a hijacking: He will say it is reported that the flight has been “showing hijacking through some electronic signal.” [White House, 11/14/2001] However, according to the NORAD representative on the air threat conference call, the plane’s transponder has not been “squawking” the code for a hijacking. “We do not have squawk indication at this point,” he has said.
Plane Is Reportedly Diverted to Pittsburgh - An FAA representative on the air threat conference call apparently says an e-mail has been sent from the suspicious aircraft, stating that the plane is being diverted to Pittsburgh, although the FAA representative’s communications are distorted and therefore unclear. [US Department of Defense, 9/11/2001]
President Says Fighters Can Shoot Down the Plane - President Bush discusses the suspicious US Airways flight with Secretary of Defense Donald Rumsfeld over the air threat conference call after landing at Offutt Air Force Base in Nebraska (see 2:50 p.m. September 11, 2001) and Major General Larry Arnold, the commander of the Continental United States NORAD Region (CONR), listens in. [Filson, 2003, pp. 87-88] Rumsfeld wants Bush to confirm that fighters are authorized to shoot down the plane if it is considered a threat to a city in the US. “The reason I called… was just to verify that your authorization for the use of force would apply as well in this situation,” he says. Bush replies, “It does, but let us make sure that the fighters and you on the ground get all the facts.” [US Department of Defense, 9/11/2001]
Plane Is on the Ground in Spain - After a time, it will be found that the plane is not a threat and is on the ground in Spain. Arnold will be called by Colonel Robert Marr, the battle commander at NEADS, and told, “We just talked to the airline and that aircraft is back on the ground in Madrid.” [Filson, 2003, pp. 88] According to Libby, “It turned out that, I think, it was only 35 minutes out of Spanish airspace, not out of our airspace.” [White House, 11/14/2001] Reggie Settles, the FAA representative at NORAD’s Cheyenne Mountain Operations Center in Colorado, will be informed by US Airways that Flight 937 in fact never existed. However, he will be told, there is a US Airways Flight 911, which “took off from Madrid,” but “has turned back and returned to Madrid,” and “is not en route to the United States.” [US Department of Defense, 9/11/2001]
President Decides to Leave Offutt after the Concerns Are Resolved - After he learns that the suspicious plane is back in Spain, Arnold will pick up the hot line and tell Bush: “Mr. President, this is the CONR commander.… No problem with Madrid.” According to Arnold, Bush will reply, “Okay, then I’m getting airborne.” [Filson, 2003, pp. 88] Bush will take off from Offutt aboard Air Force One at around 4:30 p.m. (see (4:33 p.m.) September 11, 2001). [CNN, 9/12/2001] Numerous aircraft are incorrectly suspected of being hijacked on this day (see (9:09 a.m. and After) September 11, 2001). [9/11 Commission, 7/24/2004, pp. 28; Newhouse News Service, 3/31/2005] The US Airways flight from Madrid is the last of these, according to Arnold. [Code One Magazine, 1/2002]

Entity Tags: Larry Arnold, Federal Aviation Administration, Federal Bureau of Investigation, George W. Bush, Donald Rumsfeld, North American Aerospace Defense Command, US Airways, Robert Marr, Reggie Settles, White House, Lewis (“Scooter”) Libby, Northeast Air Defense Sector, US Customs Service

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Carl Levin.Carl Levin. [Source: Publicity photo]Air Force General Richard Myers is questioned about the US military’s response to the 9/11 attacks when he appears before the Senate Armed Services Committee for his confirmation hearing as chairman of the Joint Chiefs of Staff, but his answers are vague and confused, and he claims, incorrectly, that no fighter jets were scrambled in response to the hijackings until after the Pentagon was hit. [Shenon, 2008, pp. 119; Farmer, 2009, pp. 241-243] Myers has been the vice chairman of the Joint Chiefs of Staff since March 2000. [US Air Force, 9/2005] With General Henry Shelton, the chairman of the Joint Chiefs of Staff, flying toward Europe on the morning of September 11 (see (8:50 a.m.-10:00 a.m.) September 11, 2001), he served as the acting chairman of the Joint Chiefs of Staff during the 9/11 attacks. [Myers, 2009, pp. 10; Shelton, Levinson, and McConnell, 2010, pp. 431-433]
Myers Says Fighters Were Only Scrambled after the Pentagon Attack - During the hearing, Senator Carl Levin (D-MI) asks if the Department of Defense was contacted by “the FAA or the FBI or any other agency” after the first two hijacked aircraft crashed into the World Trade Center, at 8:46 a.m. and 9:03 a.m. (see 8:46 a.m. September 11, 2001 and 9:03 a.m. September 11, 2001), but before 9:37 a.m., when the Pentagon was hit (see 9:37 a.m. September 11, 2001). Myers replies, “I don’t know the answer to that question.” Levin then asks if the military was “asked to take action against any specific aircraft” during the attacks. Myers answers, “When it became clear what the threat was, we did scramble fighter aircraft, AWACS, radar aircraft, and tanker aircraft to begin to establish orbits in case other aircraft showed up in the FAA system that were hijacked.” Myers elaborates later in the hearing, telling Senator Bill Nelson (D-FL): “[A]fter the second tower was hit, I spoke to the commander of NORAD, General [Ralph] Eberhart (see (9:37 a.m.) September 11, 2001). And at that point, I think the decision was at that point to start launching aircraft.” But he tells Levin that “to the best of my knowledge,” the order to scramble fighters was only given “after the Pentagon was struck.”
Flight 93 Was Not Shot Down, Myers Says - Myers addresses the military’s response to Flight 93, the fourth hijacked plane, which crashed in a field in Pennsylvania (see (10:03 a.m.-10:10 a.m.) September 11, 2001 and (10:06 a.m.) September 11, 2001). He says: “[I]f my memory serves me… we had launched on the one that eventually crashed in Pennsylvania. I mean, we had gotten somebody close to it, as I recall.” However, he adds, “I’ll have to check that out.” When Levin mentions that there have been “statements that the aircraft that crashed in Pennsylvania was shot down,” Myers responds, “[T]he armed forces did not shoot down any aircraft.” He says, “[W]e never actually had to use force.” Although Myers appears unclear about when the North American Aerospace Defense Command (NORAD) launched fighters in response to the hijackings, he is more confident when he states: “At the time of the first impact on the World Trade Center, we stood up our Crisis Action Team. That was done immediately. So we stood it up. And we started talking to the federal agencies.” [US Congress, 9/13/2001]
NORAD and the 9/11 Commission Contradict Myers's Account - Myers’s claim that fighters were only launched in response to the hijackings after the Pentagon was hit will later be contradicted by the accounts of NORAD and the 9/11 Commission, which state that fighters were ordered to take off from Otis Air National Guard Base in Cape Cod, Massachusetts, at 8:46 a.m. (see 8:46 a.m. September 11, 2001) and from Langley Air Force Base in Virginia at 9:24 a.m. (see 9:24 a.m. September 11, 2001). [North American Aerospace Defense Command, 9/18/2001; 9/11 Commission, 7/24/2004, pp. 20, 27] The 9/11 Commission will also contradict Myers’s claim that the military launched fighters in response to Flight 93 and “had gotten somebody close to it.” “By the time the military learned about the flight,” the 9/11 Commission Report will state, “it had crashed.” [9/11 Commission, 7/24/2004, pp. 34]
Myers's Testimony Prompts Criticism in the Media - Journalist and author Philip Shenon will question why Myers, a veteran Air Force fighter pilot, would give such an inaccurate account of the military’s response to the 9/11 attacks during the hearing. “It seemed obvious that Myers, of all people at the Pentagon, would want to know—would demand to know—how jet fighters under NORAD’s control had responded on the morning of September 11 to the threat in the skies,” he will write. [US Congress, 9/13/2001; Shenon, 2008, pp. 119] John Farmer, the senior counsel to the 9/11 Commission, will comment that “Myers’s evident confusion about precisely what had occurred prompted criticism in the media and a quick, if contradictory, response from the administration.” [Farmer, 2009, pp. 243] Major General Paul Weaver, director of the Air National Guard, will provide a more detailed account of the military’s response to the hijackings in an “impromptu hallway interview” at the Pentagon on September 14 (see September 14, 2001). [Dallas Morning News, 9/14/2001] And four days later, NORAD will release a timeline of its response to the hijackings (see September 18, 2001). [North American Aerospace Defense Command, 9/18/2001]

Entity Tags: Richard B. Myers, Senate Armed Services Committee, Carl Levin, Clarence W. (“Bill”) Nelson

Timeline Tags: Complete 911 Timeline

Major General Paul Weaver, director of the Air National Guard, provides reporters with details of the 9/11 attacks and the US military’s response to the hijackings. Speaking at the Pentagon, Weaver gives reporters a detailed account of what happened on September 11. He says Air National Guard planes responded to the hijackings on orders from NORAD’s Northeast Air Defense Sector (NEADS), which was alerted to the hijackings by the Federal Aviation Administration (FAA).
Fighters Took Off Too Late to Catch Flight 175 - Weaver says that at 8:53 a.m., seven minutes after Flight 11 crashed into the North Tower of the World Trade Center (see 8:46 a.m. September 11, 2001), two F-15 fighter jets took off from Otis Air National Guard Base in Cape Cod, Massachusetts, in pursuit of Flight 175, the second plane to be hijacked (see 8:46 a.m. September 11, 2001 and 8:53 a.m. September 11, 2001). However, Weaver says, the FAA had only told NEADS that “there was an airplane that had a problem,” and at that time it was unclear if Flight 175 had been hijacked. He says that although the fighters flew at over 500 miles per hour, they were unable to catch up with Flight 175 before it hit the South Tower of the WTC at 9:03 a.m. (see 9:03 a.m. September 11, 2001).
More Fighters Were Launched Just before Pentagon Was Hit - Weaver says Flight 77, the third aircraft to be hijacked, flew west for 45 minutes and then turned east, and its transponder was turned off. He does not claim that the military received notice that it had been hijacked, but says NEADS scrambled F-16 fighters that were on alert at Langley Air Force Base in Virginia at 9:35 a.m. (see 9:24 a.m. September 11, 2001 and (9:25 a.m.-9:30 a.m.) September 11, 2001). Two minutes later, at 9:37 a.m., the Pentagon was hit (see 9:37 a.m. September 11, 2001). The F-16s, he says, subsequently remained on patrol over the Pentagon.
No Fighters Took Off to Intercept Flight 93 - Weaver says no fighters were scrambled to chase after Flight 93, the fourth hijacked plane, which crashed in a field in Pennsylvania (see (10:03 a.m.-10:10 a.m.) September 11, 2001 and (10:06 a.m.) September 11, 2001). “There was no notification for us to launch airplanes,” he tells the reporters. “We weren’t even close.” [Dallas Morning News, 9/14/2001; Farmer, 2009, pp. 244] (However, also on this day, Deputy Defense Secretary Paul Wolfowitz contradicts Weaver’s claim. He tells PBS’s NewsHour, “[W]e were already tracking in on that plane that crashed in Pennsylvania,” and adds, “[T]he Air Force was in a position to do so [i.e. shoot Flight 93 down] if we had had to.” [NewsHour with Jim Lehrer, 9/14/2001; Farmer, 2009, pp. 245] ) Weaver says that even if fighters had caught up with the hijacked planes, they may have been unable to stop them reaching their targets. “You’re not going to get an American pilot shooting down an American airliner,” he says. “We don’t have permission to do that.” According to Weaver, only the president can issue an order to shoot down an American airliner. [Dallas Morning News, 9/14/2001]
Weaver's Account Is the 'Most Accurate' Prior to the 9/11 Commission's Investigation - The account he gives to reporters today, according to John Farmer, the senior counsel to the 9/11 Commission, will be “the last public statement uttered by General Weaver on the subject and proved to be the most accurate account of events issued until the 9/11 Commission’s investigation.” [Farmer, 2009, pp. 245] Apparently after Weaver issues his statement to the reporters, an Air Force spokesman, speaking on condition of anonymity, adds that no regular Air Force planes were scrambled during the 9/11 attacks, “because continental air defense is the mission of the Air National Guard.” He says regular Air Force fighters “have air superiority as their mission,” which means they train “to deploy somewhere where we are engaged in hostile action and secure the skies.” These fighters, according to the spokesman, “ordinarily are not ready to fly on short notice and their pilots are not on standby to defend the United States.” [Dallas Morning News, 9/14/2001]
Pentagon Has Been Slow to Answer Questions about Response to Hijackings - The Washington Post will comment, “Questions about the time it took US military planes to respond to the threat of several hijacked aircraft speeding toward the nation’s financial and military centers have dogged the Pentagon since the attacks.” It will add, “Top Pentagon officials have been slow to respond to press inquiries for a timeline that would establish the exact times that civil aviation authorities became aware of the hijackings, when US military commanders were notified, and when US fighter jets took to the air.” [Washington Post, 9/15/2001] The previous day, Air Force General Richard Myers was questioned about the military’s response to the attacks before the Senate Armed Services Committee, but his answers were vague and confused (see September 13, 2001). [US Congress, 9/13/2001; Farmer, 2009, pp. 241-242] NORAD will release its own timeline of the events of September 11 and its response to the hijackings on September 18 (see September 18, 2001). [North American Aerospace Defense Command, 9/18/2001; 9/11 Commission, 7/29/2004]

Entity Tags: US Department of the Air Force, Paul Wolfowitz, Paul Weaver

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The Federal Aviation Administration (FAA) produces a chronology of the events of September 11, which it uses when it briefs the White House today, but the document fails to mention when NORAD’s Northeast Air Defense Sector (NEADS) was alerted to two of the hijacked planes. The FAA’s chronology, titled “Summary of Air Traffic Hijack Events,” incorporates “information contained in the NEADS logs, which had been forwarded, and on transcripts obtained from the FAA’s Cleveland Center, among others,” according to John Farmer, the senior counsel to the 9/11 Commission.
Document Includes Notification Times for First Two Hijacked Flights - The chronology refers “accurately to the times shown in NEADS logs for the initial notifications from FAA about the hijacking of American 11 and the possible hijacking of United 175,” according to the 9/11 Commission. It gives 8:40 a.m. as the time at which the FAA alerted NEADS to Flight 11, the first plane to be hijacked (see (8:37 a.m.) September 11, 2001), and 9:05 a.m. as the time when the FAA alerted NEADS to Flight 175, the second plane to be hijacked (see (9:03 a.m.) September 11, 2001). However, it makes no mention of when the FAA alerted NEADS to Flight 77 and Flight 93, the third and fourth planes to be hijacked. The FAA’s omission of these two notification times is “suspicious,” according to the 9/11 Commission, “because these are the two flights where FAA’s notification to NEADS was significantly delayed.”
Document Omits Notification Times for Flights 77 and 93 - The chronology, as Farmer will later point out, “makes no mention… of the notification to NEADS at 9:33 that American 77 was ‘lost’ (see 9:34 a.m. September 11, 2001) or of the notification to NEADS at 9:34 of an unidentified large plane six miles southwest of the White House (see 9:36 a.m. September 11, 2001), both of which are in the NEADS logs that the FAA reviewed” when it was putting together the timeline. It also fails to mention the call made by the FAA’s Cleveland Center to NEADS in which, at 10:07 a.m., the caller alerted NEADS to Flight 93 and said there was a “bomb on board” the plane (see 10:05 a.m.-10:08 a.m. September 11, 2001), even though this information was also “duly noted in the NEADS logs” that the FAA has reviewed.
Chronology Omits Other Key Information - The chronology, Farmer will write, reflects “a time at which the FAA was notified that the Otis [Air National Guard Base] fighters were scrambled” in response to the hijacking of Flight 11 (see 8:46 a.m. September 11, 2001), but it gives “no account of the scramble of the fighters from Langley Air Force Base” (see 9:24 a.m. September 11, 2001). It also fails to mention the report that NEADS received after Flight 11 crashed, in which it was incorrectly told the plane was still airborne and heading toward Washington, DC (see 9:21 a.m. September 11, 2001). Despite lacking information about the times when the FAA alerted NEADS to Flights 77 and 93, the FAA’s chronology is one of the documents used to brief the White House about the 9/11 attacks today (see September 17, 2001).
Investigators Were Told to Determine Exact Notification Times - The chronology is the product of investigations that began promptly in response to the 9/11 attacks. According to senior FAA officials, FAA Administrator Jane Garvey and Deputy Administrator Monte Belger “instructed a group of FAA employees (an ‘after-action group’) to reconstruct the events of 9/11.” This group, according to the 9/11 Commission, “began its work immediately after 9/11 and reviewed tape recordings, transcripts, handwritten notes, logs, and other documents in an effort to create an FAA chronology of events.” The group, according to one witness, “was specifically asked to determine exactly when the FAA notified the military that each of the four planes had been hijacked,” and “[s]everal people worked on determining correct times for FAA notifications to the military.” [Federal Aviation Administration, 9/17/2001 pdf file; 9/11 Commission, 7/29/2004; Farmer, 2009, pp. 245-247] NORAD will release a timeline of the events of September 11 and its response to the attacks a day after the FAA chronology is published (see September 18, 2001). [North American Aerospace Defense Command, 9/18/2001; 9/11 Commission, 7/29/2004]

Entity Tags: Federal Aviation Administration

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The North American Aerospace Defense Command (NORAD) releases a chronology of the events of September 11 and its response to the terrorist attacks that day, but the accuracy of this account will later be challenged by the 9/11 Commission. [North American Aerospace Defense Command, 9/18/2001; 9/11 Commission, 7/24/2004, pp. 34; 9/11 Commission, 7/29/2004]
NORAD Learned of First Hijackings Too Late to Defend the WTC - The chronology provides the times at which NORAD’s Northeast Air Defense Sector (NEADS) was alerted to the hijackings and when fighter jets were scrambled in response to the hijackings. It states that the Federal Aviation Administration (FAA) notified NEADS about Flight 11, the first hijacked aircraft, at 8:40 a.m. In response, the order was given to scramble two F-15 fighters from Otis Air National Guard Base in Cape Cod, Massachusetts, at 8:46 a.m. (see 8:46 a.m. September 11, 2001), the same time that Flight 11 crashed into the World Trade Center (see 8:46 a.m. September 11, 2001), and the fighters were airborne at 8:52 a.m. (see 8:53 a.m. September 11, 2001). The FAA notified NEADS about Flight 175, the second hijacked aircraft, at 8:43 a.m., according to the chronology. When Flight 175 crashed into the WTC at 9:03 a.m. (see 9:03 a.m. September 11, 2001), the chronology states, the Otis fighters were 71 miles away from New York.
Fighters Were Scrambled in Response to Flight 77 Hijacking - NEADS was alerted to Flight 77, the third hijacked aircraft, at 9:24 a.m., according to the chronology. In response, the order was given to scramble two F-16 fighters from Langley Air Force Base in Virginia (see 9:24 a.m. September 11, 2001) and these were airborne at 9:30 a.m. (see (9:25 a.m.-9:30 a.m.) September 11, 2001). But the F-16s were 105 miles from the Pentagon when it was hit at 9:37 a.m. (see 9:37 a.m. September 11, 2001). Regarding the fourth hijacked aircraft, Flight 93, the chronology gives “N/A” as the time the FAA alerted NEADS, but it also states that the FAA and NEADS discussed the flight on “a line of open communication.” At 10:03 a.m., when Flight 93 crashed in Pennsylvania (see (10:03 a.m.-10:10 a.m.) September 11, 2001 and (10:06 a.m.) September 11, 2001), the chronology states, the F-16s launched from Langley Air Force Base in response to the hijacking of Flight 77 were “in place to protect DC.” [North American Aerospace Defense Command, 9/18/2001]
9/11 Commission Disputes NORAD's Account - The 9/11 Commission Report, released in 2004, will highlight what it says are inaccuracies in NORAD’s timeline of the events of September 11. It will state that NORAD’s claim that NEADS was alerted to Flight 77 at 9:24 a.m. was incorrect. The notice NEADS received at that time, according to the report, was the incorrect claim that Flight 11 “had not hit the World Trade Center and was heading for Washington, DC” (see 9:21 a.m. September 11, 2001). “NEADS never received notice that American 77 was hijacked,” the report will state. “It was notified at 9:34 that American 77 was lost (see 9:34 a.m. September 11, 2001). Then, minutes later, NEADS was told that an unknown plane was six miles southwest of the White House” (see 9:36 a.m. September 11, 2001). The report will state that NORAD’s claim that the Langley fighters were scrambled in response to the notification about Flight 77 is also incorrect. Instead, it will state, the fighters were scrambled in response to the incorrect report that Flight 11 was still airborne and heading south. [9/11 Commission, 7/24/2004, pp. 34]
9/11 Commission Disputes NORAD's Account regarding Flights 175 and 93 - Furthermore, whereas NORAD’s chronology claims that NEADS discussed Flight 93 with the FAA on “a line of open communication,” the 9/11 Commission Report will state that NEADS “first received a call about United 93 from the military liaison at [the FAA’s] Cleveland Center at 10:07,” by which time the plane “had already crashed” (see 10:05 a.m.-10:08 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 30] And while NORAD states that the FAA notified NEADS about Flight 175 at 8:43 a.m., according to the report, the first notification came “in a phone call from [the FAA’s] New York Center to NEADS at 9:03” (see (9:03 a.m.) September 11, 2001). [9/11 Commission, 7/24/2004, pp. 23]
Military Has Been Slow to Provide Details of Its Response on September 11 - US military officials, according to the Washington Post, “have been slow to respond to press inquiries for a timeline that would establish the exact times that civil aviation authorities became aware of the hijackings, when US military commanders were notified, and when US fighter jets took to the air.” [Washington Post, 9/15/2001] On September 13, Air Force General Richard Myers was questioned about the military’s response to the 9/11 attacks before the Senate Armed Services Committee, but his answers were vague and confused (see September 13, 2001). [US Congress, 9/13/2001; Farmer, 2009, pp. 241-242] A day later, Major General Paul Weaver, director of the Air National Guard, provided reporters with details of the military’s response to the hijackings in an “impromptu hallway interview” at the Pentagon (see September 14, 2001). [Dallas Morning News, 9/14/2001]

Entity Tags: North American Aerospace Defense Command

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Wayne Allard.Wayne Allard. [Source: Publicity photo]General Ralph Eberhart, the commander of the North American Aerospace Defense Command (NORAD), appears before the Senate Armed Services Committee and gives NORAD’s account of the events of September 11 and the military’s response to the terrorist attacks that day, but the 9/11 Commission will later find that some of the information he provides is incorrect. [US Congress. Senate, 10/25/2001; 9/11 Commission, 7/29/2004; Farmer, 2009, pp. 248] Eberhart was at NORAD headquarters at Peterson Air Force Base, Colorado, and then went to NORAD’s operations center in Cheyenne Mountain when the 9/11 attacks were taking place. [9/11 Commission, 3/1/2004 pdf file; 9/11 Commission, 3/1/2004] NORAD released a timeline of its response to the hijackings on September 18 (see September 18, 2001) and Eberhart’s testimony is consistent with that account. [North American Aerospace Defense Command, 9/18/2001]
Eberhart Says Fighters Were Scrambled in Response to First Hijacking - During the hearing, Eberhart tells Senator Wayne Allard (R-CO) that after the Federal Aviation Administration (FAA) alerted NORAD to the first hijacking, of Flight 11 (see (8:37 a.m.) September 11, 2001), NORAD ordered two F-15 fighter jets to take off from Otis Air National Guard Base in Cape Cod, Massachusetts (see 8:46 a.m. September 11, 2001), “almost simultaneously to the first crash” at the World Trade Center (see 8:46 a.m. September 11, 2001). Eberhart says that after he learned a plane had hit the WTC, he was initially unsure if that plane was Flight 11. “I’m sitting there hoping that someone has made a mistake; there has been an accident; that this isn’t the hijacked airplane [that hit the WTC], because there is confusion,” he recalls. He says he was informed that “it was a light commuter airplane” that hit the WTC, although, he says, it “didn’t look like that was caused by a light commuter airplane.”
Fighters Didn't Have Enough Time to Stop Second Crash - Eberhart says the FAA notified NORAD that there was “a second hijacked plane”—referring to Flight 175—“somewhere in there,” but although the Otis fighters were “flying toward New York” after being scrambled, they were still eight minutes away from the city when Flight 175 crashed into the WTC at 9:03 a.m. (see 9:03 a.m. September 11, 2001). “Tragically, there was just too much distance between Otis and New York City to get there in time,” Eberhart comments.
Eberhart Says NORAD Learned Flight 77 Was Hijacked before It Crashed - Eberhart says the first documented instance NORAD has of the FAA notifying it about Flight 77, the third aircraft to be hijacked, was at 9:24 a.m. After the hearing, in responses submitted for the record, Eberhart adds that the FAA notified NORAD’s Northeast Air Defense Sector (NEADS) that Flight 77 “was headed towards Washington, DC.” NEADS, he states, “then passed this information to NORAD’s Air Warning Center and Command Center in Cheyenne Mountain, and to the Continental US NORAD Region’s Regional Air Operations Center.”
Fighters Were Scrambled Too Late to Prevent the Pentagon Attack - Eberhart says NORAD launched two F-16 fighters from Langley Air Force Base in Virginia “as soon as” the FAA alerted it to the hijacking of Flight 77 (see 9:24 a.m. September 11, 2001). However, he says, these fighters were still “approximately 13 minutes away from Washington, DC, when that tragic crash [at the Pentagon] occurred.”
Eberhart Is Unaware of Reason for FAA's Delay in Contacting NORAD - Senator Carl Levin (D-MI) tells Eberhart: “The timeline that we’ve been given is that at 8:55 on September 11, American Airlines Flight 77 began turning east, away from its intended course. And at 9:10, Flight 77 was detected by the FAA radar over West Virginia heading east. That was after the two planes had struck the World Trade Center towers. Then 15 minutes later, at 9:25, the FAA notified NORAD that Flight 77 was headed toward Washington.” In light of this, he asks, “[D]o you know why it took 15 minutes for the FAA to notify NORAD?” Eberhart replies: “I do not know, sir, why it took that amount of time for FAA. I hate to say it, but you’ll have to ask FAA.” Senator John Warner (R-VA), who has an extensive military background, tells Eberhart he is “a little bit stunned that you don’t know why that delay occurred.” He continues, saying, “I would have thought by now all of you in this chain would have gone back, rehearsed these things, figured out what happened, what went wrong, so that we ensure it won’t happen again.” In his responses submitted for the record, Eberhart suggests possible reasons for the delay, stating that after the FAA lost radar contact with Flight 77, it “began to receive calls from outside agencies with reports of a possible downed aircraft. Additionally, the loss of radio contact with the aircraft added to the confusion.” Consequently, he states, “I believe the FAA was faced with conflicting information, which hindered them from making an accurate assessment of the actual location of the aircraft.”
Eberhart Says NORAD Was Following Flight 93 before It Crashed - Eberhart says NORAD was aware of the problems with Flight 93, the fourth hijacked plane, before it crashed in Pennsylvania (see (10:03 a.m.-10:10 a.m.) September 11, 2001 and (10:06 a.m.) September 11, 2001). He tells Allard that the FAA “knew before it deviated its flight pattern” that Flight 93 “was hijacked.” He says NORAD had been “trying to decide, initially, if that flight was going to continue west and if there was some other target for that flight. Was it Chicago? Was it St. Louis? And what might we do to launch an aircraft to intercept it.” But he says that after the FAA reacquired Flight 93 on radar, NORAD thought the plane “was headed probably for Washington, DC, but maybe New York.” He says NORAD decided at that time to keep the Otis and Langley fighters in place over New York and Washington. If another suspicious plane was approaching, he says, “our intent was to go out and meet that aircraft and destroy it if we needed to, if it entered either Washington, DC, or New York City airspace.” However, in his responses submitted for the record, Eberhart states that the “data/log entries received by NORAD from the FAA [after September 11] do not show a time or entry indicating the FAA specifically notified the Pentagon that United Airlines Flight 93 was hijacked.” He also states that NORAD “did not notify” the National Military Command Center (NMCC) at the Pentagon that Flight 93 had been hijacked.
9/11 Commission Disputes Some of Eberhart's Claims - Several claims Eberhart makes in the hearing will be contradicted by evidence uncovered by the 9/11 Commission during its investigation of the terrorist attacks. Whereas Eberhart says the military was first notified about the hijacking of Flight 77 at 9:24 a.m. and implies that this notification prompted the scrambling of fighters from Langley Air Force Base, according to John Farmer, the senior counsel to the 9/11 Commission, “[T]he first notification regarding American 77 occurred at 9:34, when it was reported ‘lost’” (see 9:34 a.m. September 11, 2001). [US Congress. Senate, 10/25/2001; Farmer, 2009, pp. 248-254] The notice NEADS received at 9:24 a.m., according to the 9/11 Commission Report, was the incorrect claim that Flight 11 “had not hit the World Trade Center and was heading for Washington, DC” (see 9:21 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 34] Consequently, Farmer will write, “the scramble of the Langley fighters did occur as an immediate reaction to a notification about hijacking, but that notification was not, as [Eberhart’s] testimony implies, a report that American 77 was hijacked, but the report that American 11 was still airborne and heading for Washington.” And while Eberhart claims the FAA told NEADS that Flight 77 was heading toward Washington, according to Farmer: “The FAA never notified NEADS that American 77 was heading for Washington, DC. There is no such notification recorded on any tape or in any log maintained at NEADS or at NORAD.” Furthermore, while Eberhart claims the military was following Flight 93 on radar before it crashed and was in position to shoot it down if it approached Washington, Farmer will write that “in fact, NEADS never located United 93 on radar, because the plane had already crashed by the time NEADS was notified.” [Farmer, 2009, pp. 251, 254-255]

Entity Tags: John W. Warner, Carl Levin, Ralph Eberhart, North American Aerospace Defense Command, Senate Armed Services Committee, Wayne Allard

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

One of the key variables in the computer simulations used by the National Institute of Standards and Technology (NIST) (see (October 2002-October 2005)) to explain the WTC collapses is the speed of the aircraft that hit the towers. However, there is no consensus on how fast the planes were traveling. The first estimate was contained in an initial research paper by engineers Zdenek Bazant and Yong Zhou, who stated that the planes were traveling at 342 miles per hour. [Bazant and Zhou, 1/2002 pdf file] However, the Federal Emergency Management Agency (FEMA) and American Society of Civil Engineers (ASCE) report said that the plane that hit the North Tower was traveling at 470 miles per hour, whereas the plane that hit the South Tower was traveling at 590 miles per hour (see May 1, 2002). [Federal Emergency Management Agency, 5/1/2002, pp. 31] NIST initially estimates speeds of 435 miles per hour for the plane that hit the North Tower and 497 miles per hour for the plane that hit the South Tower. These estimates closely match figures produced by the Massachusetts Institute of Technology, which finds speeds of 429 miles per hour and 503 miles per hour for the two planes. However, NIST is dissatisfied with these results and does a second study, which finds speeds of 466 and 545 miles per hour. It then uses speeds of 472 and 570 miles per hour in its severe case model, on which its final report is based. In this model, the simulation of the planes traveling faster means greater damage to the towers’ structure, making them more unstable. [Kausel, 5/2002 pdf file; National Institute of Standards & Technology, 9/2005, pp. 152-165 pdf file; National Institute of Standards and Technology, 9/2005, pp. 109]

Entity Tags: Zdenek Bazant, National Institute of Standards and Technology, World Trade Center, Yong Zhou, Massachusetts Institute of Technology, American Society of Civil Engineers, Federal Emergency Management Agency

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Matthys Levy.Matthys Levy. [Source: PBS]A report is made publicly available, which the Engineering News-Record calls the “most comprehensive study yet on the destruction of the World Trade Center.” The study was commissioned by WTC leaseholder Silverstein Properties Inc. to support a $7 billion insurance claim, and conducted by a team of engineers from several leading firms, including Weidlinger Associates, LZA Technology/Thornton-Tomasetti, and ARUPFire. It is intended to build on a previous study sponsored by FEMA (see May 1, 2002). The report’s findings are based on an analysis of original structural drawings, thousands of photos, and dozens of videos. Investigators used fire evaluation techniques and powerful computer software to simulate the condition of each tower at critical times between the planes’ impacts and the towers’ collapses. The earlier FEMA investigators had no access to such computer modeling. Matthys Levy, the chairman of Weidlinger Associates and one of the engineers on the study team, says, “The buildings had tremendous reserve capacity and that was reflected in all of the elements we analyzed. In fact, because there were so much excess capacity, the columns even in the impact floors did not buckle immediately, but failed as the result of the fire.” The report states that failure of the WTC’s steel floor supports (“trusses”) did not contribute to the collapses. Instead, the collapses were caused by the failure of steel structural columns that were either destroyed when the planes hit or lost fireproofing, leaving them vulnerable to the weakening effects of the ensuing fires. It says that debris and dust distributed by the plane crashes inhibited the fires, such that the average air temperatures on the impact floors were between 400 and 700°C (750-1,300°F): significantly lower than those associated with typical “fully developed” office fires. However, says Matthys Levy, “By the time the temperature inside the buildings reached 400 degrees, the steel would have lost approximately 50% of its strength. Eventually, gravity took over and the towers began to fall.” Then, according to the analysis led by researchers from LZA Technology/Thornton-Tomasetti, “Once collapse initiated in each tower, essentially all of the interior structure of the tower fell straight down with floors pancaking on top of one another. The network of perimeter steel columns and spandrels acted like a chute to funnel the interior contents into the tower footprint.” According to the computer simulations, the damage to the South Tower’s steel core columns was so severe that the tower should have collapsed immediately after the plane hit. Civil engineer John Osteraas says this incorrect result casts doubt upon some of the study’s predictions. The report concludes that the collapse of the South Tower did not cause or contribute to the subsequent collapse of the North Tower, thus supporting Silverstein Properties’ claim that the terrorist attack represented two occurrences, entitling it to two $3.5 billion insurance policy limits. A separate study commissioned by the insurers contradicts this (see October 23, 2002). The Silverstein report apparently does not examine the collapse of WTC Building 7, a 47-story skyscraper that also collapsed on 9/11 (see (5:20 p.m.) September 11, 2001). It has been passed on to the National Institute of Standards and Technology (NIST), which is undertaking its own investigation of the WTC collapses (see August 21, 2002). [New York Times, 9/30/2002; Business Insurance, 10/23/2002; Silverstein Properties, Inc., 10/23/2002 pdf file; Engineering News-Record, 10/25/2002; New York Times, 10/29/2002; Engineering News-Record, 11/4/2002; Real Estate Weekly, 4/30/2003]

Entity Tags: World Trade Center, Silverstein Properties, Thornton-Tomasetti Engineers, Weidlinger Associates, Matthys Levy

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Shyam Sunder.Shyam Sunder. [Source: NIST]The National Institute of Standards and Technology (NIST) releases nearly 500 pages of documents, detailing the latest findings of its investigation of the WTC collapses on 9/11. These include its hypotheses for the collapse sequences of each of the Twin Towers; details of their analysis of interviews with nearly 1,200 building occupants, emergency responders, and victims’ relatives; and information from their analysis of the emergency response and evacuation procedures. Their investigation into the collapses is based upon an analysis of thousands of photos and videos, examination of many of the elements used to construct the towers, and computer-enhanced modeling of the plane impacts and the spreading of the fires. Their hypothesis is that the towers collapsed ultimately due to the fires they suffered: As the fires burned, the buildings’ steel core columns buckled and shortened. This shifted more load to the buildings’ perimeter columns, which were already affected by the heat of the fires, and caused them to give way under the increased stress. Investigators have conducted a test with a reconstructed section of the WTC floor, and found that the original fireproofing was sufficient to meet the New York City building code. They say that had a typical office fire occurred in the towers, without the structural damage and the loss of some fireproofing caused by the plane impacts, it is likely the buildings would have remained standing. Lead investigator Dr. Shyam Sunder says, “The buildings performed as they should have in the airplane impact and extreme fires to which they were subjected. There is nothing there that stands out as abnormal.” NIST’s theories of why the WTC buildings collapsed conflict with an earlier investigation by FEMA, which claimed the collapse of the North Tower had begun in its core, rather than its perimeter columns (see May 1, 2002). [National Institute of Standards and Technology, 10/19/2004; New York Times, 10/20/2004]

Entity Tags: Shyam Sunder, National Institute of Standards and Technology, World Trade Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The National Institute of Standards and Technology (NIST), which is conducting an investigation into the WTC collapses on 9/11, releases three new reports. Investigators say that the Twin Towers would probably have remained standing if the fireproofing material that surrounded the buildings’ structural steel had not been stripped away when the planes hit. Their report states that “[t]he jet fuel, which ignited the fires, was mostly consumed within the first few minutes after impact. The fires that burned for almost the entire time that the buildings remained standing were due mainly to burning building contents and, to a lesser extent, aircraft contents, not jet fuel.” However, they claim, without the loss of fireproofing during the planes’ impacts, the heat from the fires would have been insufficient to cause the buildings to collapse. They say that although the architects had in 1964 tested the impact of a Boeing 707 airplane crashing into the 80th floor of one of the towers, they never envisioned the intense fires that ensued. NIST also reports that the time taken by survivors from the North Tower to descend a flight of stairs was about double the slowest evacuation speed estimated in a standard fire engineering text. They state: “approximately 87 percent of the WTC tower occupants, including more than 99 percent below the floors of impact, were able to evacuate successfully.” However, they say, if each tower had been full when they were hit, as many as 14,000 people could have died. [National Institute of Standards and Technology, 4/5/2005; Associated Press, 4/5/2005; New York Times, 4/5/2005; Associated Press, 4/6/2005]

Entity Tags: World Trade Center, National Institute of Standards and Technology

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

National Institute of Standards and Technology (NIST) releases a 12-page appendix to its final reports on the WTC collapses (see October 26, 2005) detailing tests it conducted on samples of the type of fireproofing used in the WTC. An earlier NIST report had concluded that loss of fireproofing was a major factor in the collapses (see April 5, 2005). The appendix was not included in earlier drafts of the report (see June 23, 2005) [National Institute of Standards and Technology, 6/23/2005 pdf file; National Institute of Standards & Technology, 9/2005, pp. 263-274 pdf file; National Institute of Standards and Technology, 9/2005, pp. 149] NIST conducted a series of fifteen tests. In the tests projectiles were fired at fireproofing mounted on 12 inch x 12 inch plates, and steel bars with a one inch diameter. The fireproofing used in the tests was Blazeshield DC/F, one of the two grades of fireproofing used on the impact floors. In thirteen of the tests the projectiles were buckshot, which was fired at the steel samples from a modified shotgun at a distance of 29.5 ft. The other two tests used steel bolts and hexagon nuts, fired with less velocity and at closer range. According to NIST, “The test results support the assumption that, within the debris field created by the aircraft impact into WTC 1 and WTC 2, the SFRM [i.e., fireproofing] used for thermal insulation of structural members was damaged and dislodged.” [National Institute of Standards & Technology, 9/2005, pp. 83, 263-274 pdf file]

Entity Tags: National Institute of Standards and Technology, World Trade Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

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