Context of '9:16 a.m. September 11, 2001: Flight 93 Reported Hijacked before Hijacking Supposedly Occurs, According to Some Accounts; One Hijacker May Have Snuck into Cockpit Early'

NORAD’s war room in Cheyenne Mountain, Colorado [Source: Val Gempis]Lieutenant Colonel Dawne Deskins and other day shift employees at NORAD’s Northeast Air Defense Sector (NEADS) in Rome, NY, start their workday. NORAD is conducting a week-long, large-scale exercise called Vigilant Guardian. [Newhouse News Service, 1/25/2002] Deskins is regional mission crew chief for the Vigilant Guardian exercise. [ABC News, 9/11/2002]
Exercise Includes Simulated Attack on the US - Vigilant Guardian is described as “an exercise that would pose an imaginary crisis to North American Air Defense outposts nationwide”; as a “simulated air war”; and as “an air defense exercise simulating an attack on the United States.” According to the 9/11 Commission, it “postulated a bomber attack from the former Soviet Union.” [Newhouse News Service, 1/25/2002; Filson, 2003, pp. 55 and 122; 9/11 Commission, 7/24/2004, pp. 458] Vigilant Guardian is described as being held annually, and is one of NORAD’s four major annual exercises. [GlobalSecurity (.org), 4/14/2002; Filson, 2003, pp. 41; Arkin, 2005, pp. 545] However, one report says it takes place semi-annually. [Aviation Week and Space Technology, 6/3/2002] Accounts by participants vary on whether 9/11 is the second, third, or fourth day of the exercise. [Code One Magazine, 1/2002; Newhouse News Service, 1/25/2002; Ottawa Citizen, 9/11/2002] Vigilant Guardian is a command post exercise (CPX), and in at least some previous years was conducted in conjunction with Stratcom’s Global Guardian exercise and a US Space Command exercise called Apollo Guardian. [US Congress, n.d.; GlobalSecurity (.org), 4/14/2002; Arkin, 2005, pp. 545] All of NORAD is participating in Vigilant Guardian on 9/11. [Aviation Week and Space Technology, 6/3/2002]
Exercise Includes Simulated Hijacking - Vanity Fair reports that the “day’s exercise” (presumably Vigilant Guardian) is “designed to run a range of scenarios, including a ‘traditional’ simulated hijack in which politically motivated perpetrators commandeer an aircraft, land on a Cuba-like island, and seek asylum.” [Vanity Fair, 8/1/2006] However, at NEADS, most of the dozen or so staff on the operations floor have no idea what the exercise is going to entail and are ready for anything. [Utica Observer-Dispatch, 8/5/2004]
NORAD Fully Staffed and Alert - NORAD is currently running a real-world operation named Operation Northern Vigilance (see September 9-11, 2001). It may also be conducting a field training exercise calling Amalgam Warrior on this morning (see 9:28 a.m. September 11, 2001). NORAD is thus fully staffed and alert, and senior officers are manning stations throughout the US. The entire chain of command will be in place and ready when the first hijacking is reported. An article later says, “In retrospect, the exercise would prove to be a serendipitous enabler of a rapid military response to terrorist attacks on September 11.” [Aviation Week and Space Technology, 6/3/2002; Bergen Record, 12/5/2003] Colonel Robert Marr, in charge of NEADS, will say: “We had the fighters with a little more gas on board. A few more weapons on board.” [ABC News, 9/11/2002] However, Deskins and other NORAD officials later are initially confused about whether the 9/11 attacks are real or part of the exercise (see (8:38 a.m.-8:43 a.m.) September 11, 2001).

Entity Tags: Northeast Air Defense Sector, Dawne Deskins, North American Aerospace Defense Command, Operation Northern Vigilance, Vigilant Guardian, Robert Marr

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

In the NORAD operations center in Cheyenne Mountain, Colorado, workers see the second aircraft crashing into the World Trade Center live on television. [Gazette (Colorado Springs), 10/7/2001] Major General Rick Findley, NORAD’s director of operations, later says that he now realizes “it was not an accident but a coordinated attack.” Then, he recalls, “At about that moment in time, every phone in this cab, and every phone over in the command center, and every phone in all the centers in this building were ringing off the hook.” Master Corporal Daniel Milne, the emergency action controller in the operations center, will similarly recall, “The feeling was total disbelief. Then the phones started ringing like crazy.” [Canadian Broadcasting Corporation, 9/11/2002; Legion Magazine, 11/2004] It is unclear what causes all the phones to simultaneously ring. According to Aviation Week and Space Technology magazine, after the second tower is hit, “Calls from fighter units… started pouring into NORAD and sector operations centers, asking, ‘What can we do to help?’” (see (After 9:03 a.m.) September 11, 2001) [Aviation Week and Space Technology, 6/3/2002] So this could be one factor. Also, a 1996 article in Airman magazine had quoted Stacey Knott, a technician in the NORAD operations center. She’d said, “Things can be pretty quiet in here.” However, “One of the busiest times is during exercises. This room fills up.… The phones are ringing off the hook, and I’ve got phones in each hand.” [Airman, 1996] On this morning, those in Cheyenne Mountain are in fact participating in a major exercise called Vigilant Guardian. [Aviation Week and Space Technology, 6/3/2002; CNN, 9/11/2006] This is reportedly only canceled “shortly after” the second attack (see (Shortly After 9:03 a.m.) September 11, 2001) [Airman, 3/2002; Filson, 2003, pp. 59] So it is plausible that this is also a factor in causing all the phones to suddenly ring. A similar thing appears to occur in the National Military Command Center (NMCC) at the Pentagon. According to a news article based on the recollections of two officers who are there, after the second plane hits the WTC, “Phones in the center began ringing off the hook.” [American Forces Press Service, 9/7/2006] Rick Findley later suggests that all the ringing phones are not a hindrance for NORAD, claiming, “The good news is we had lots of people here and we already had an operational architecture. We already had the command and control, the network, the phones, the data links. Everything was already in place that enabled us to react to the situation.” [Canadian Broadcasting Corporation, 9/11/2002]

Entity Tags: Daniel Milne, North American Aerospace Defense Command, Rick Findley, Vigilant Guardian

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

A NORAD training exercise that is taking place this morning, presumably Vigilant Guardian (see (6:30 a.m.) September 11, 2001), is reportedly canceled shortly after 9:03, when the second World Trade Center tower is hit. [Airman, 3/2002] NORAD Commander Larry Arnold later says that after Flight 175 hits the South Tower, “I thought it might be prudent to pull out of the exercise, which we did.” [Filson, 2003, pp. 59] According to author Lynn Spencer: “The phone calls start flying between the various NORAD command centers. General Arnold calls Maj. Gen. Rick Findley” at NORAD’s operations center in Cheyenne Mountain, Colorado, “to give him the latest information and have him withdraw all forces from the simulated exercise.” [Spencer, 2008, pp. 86] Arnold will recall, “As we pulled out of the exercise we were getting calls about United Flight 93 and we were worried about that.” [Filson, 2003, pp. 59] Some early accounts say the military receives notification of the possible hijacking of Flight 93 at around 9:16 a.m. (see 9:16 a.m. September 11, 2001). [CNN, 9/17/2001; 9/11 Commission, 5/23/2003] However, the 9/11 Commission will later claim that NORAD’s Northeast Air Defense Sector (NEADS) first receives a call about Flight 93 at 10:07 a.m. (see 10:05 a.m.-10:08 a.m. September 11, 2001). [9/11 Commission, 6/17/2004] Arnold will add, “Then we had another call from Boston Center about a possible hijacking, but that turned out to be the airplane that had already hit the South Tower but we didn’t know that at the time.” [Filson, 2003, pp. 59]

Entity Tags: Larry Arnold, North American Aerospace Defense Command, Vigilant Guardian, Rick Findley

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

According to an early timeline laid out to CNN by unnamed but “informed defense officials,” the FAA informs NORAD at this time that Flight 93 may have been hijacked. [CNN, 9/17/2001] In public testimony before the 9/11 Commission in 2003, NORAD officials will similarly claim that the FAA first reports the possible hijacking of Flight 93 at this time. [9/11 Commission, 5/23/2003] Yet this is 12 minutes before the hijacking is meant to have occurred (see (9:28 a.m.) September 11, 2001). [9/11 Commission, 8/26/2004, pp. 38 ] One explanation is put forward that could possibly help explain the discrepancy: There are media reports that “investigators had determined from the cockpit voice recorder from United Airlines Flight 93… that one of the four hijackers had been invited into the cockpit area before the flight took off from Newark, New Jersey.” Cockpit voice recordings indicate that the pilots believed their guest was a colleague “and was thereby extended the typical airline courtesy of allowing any pilot from any airline to join a flight by sitting in the jumpseat, the folded over extra seat located inside the cockpit.” [Fox News, 9/24/2001; Herald Sun (Melbourne), 9/25/2001] This would be consistent with passenger phone calls from the plane, describing only three hijackers on Flight 93 (see (9:27 a.m.-10:03 a.m.) September 11, 2001). [Longman, 2002, pp. 120] However, the reports will not be confirmed. The 9/11 Commission Report will dismiss the claim that NORAD was alerted at 9:16, stating, “In public testimony before this Commission in May 2003, NORAD officials stated that at 9:16, NEADS received hijack notification of United 93 from the FAA. This statement was incorrect. There was no hijack to report at 9:16. United 93 was proceeding normally at that time.” [9/11 Commission, 7/24/2004, pp. 34] No further explanations will be offered for the incorrect timelines. NORAD’s own initial timeline, released on September 18, 2001, will not give a time for when the FAA alerted it to Flight 93. It will only say that the FAA and its Northeast Air Defense Sector (NEADS) “established a line of open communication discussing AA Flt 77 and UA Flt 93.” [North American Aerospace Defense Command, 9/18/2001]

Entity Tags: Northeast Air Defense Sector, North American Aerospace Defense Command, Federal Aviation Administration

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

According to journalist and author Jere Longman, “On all phone calls made from [Flight 93], passengers reported seeing only three hijackers. Not a single caller reported four hijackers.” [Longman, 2002, pp. 120] (As an exception, one article in the Pittsburgh Post-Gazette claims that passenger Todd Beamer describes four hijackers; however, other reports say he describes only three (see 9:45 a.m.-9:58 a.m. September 11, 2001). [Pittsburgh Post-Gazette, 10/28/2001] ) Yet the official claim is that there are four hijackers on this plane. [Federal Bureau of Investigation, 9/27/2001; 9/11 Commission, 7/24/2004, pp. 4] Some family members of the passengers and crew will later be suspicious that one of the hijackers was in the plane’s cockpit from takeoff (see 9:16 a.m. September 11, 2001). However, according to Longman, “Investigators, pilots, flight attendants and United officials tended to discount this theory.… Paperwork would have to be filled out in advance if an observer requested to sit in the cockpit. No request was made for Flight 93, United officials later reported.… Flight 93 was hijacked approximately forty-five minutes after it left Newark. Other pilots agreed that Captain Dahl likely would have requested that any observer return to his regular seat by that time.” [Longman, 2002, pp. 120] The 9/11 Commission’s explanation for the reports of three hijackers instead of four is that Ziad Jarrah, “the crucial pilot-trained member of [the hijacker’s] team, remained seated and inconspicuous until after the cockpit was seized; and once inside, he would not have been visible to the passengers.” [9/11 Commission, 7/24/2004, pp. 12]

Entity Tags: Jere Longman

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Jason Dahl. [Source: Publicity photo]According to the 9/11 Commission, less than a minute after Flight 93 acknowledged a routine radio transmission from the FAA’s Cleveland Center (see 9:27 a.m. September 11, 2001), John Werth—the controller handling the flight—and pilots of other aircraft in the vicinity of Flight 93 hear “a radio transmission of unintelligible sounds of possible screaming or a struggle from an unknown origin.” [Federal Aviation Administration, 9/11/2001; 9/11 Commission, 6/17/2004; CBS News, 9/10/2006] Someone, presumably Flight 93’s pilot Jason Dahl, is overheard by controllers as he shouts, “Mayday!” [New York Times, 7/22/2004] Seconds later, the controller responds, “Somebody call Cleveland?” Then there are more sounds of screaming and someone yelling, “Get out of here, get out of here.” [Toronto Sun, 9/16/2001; Newsweek, 9/22/2001; Observer, 12/2/2001; MSNBC, 7/30/2002; 9/11 Commission, 6/17/2004] Then the voices of the hijackers can be heard talking in Arabic. The words are later translated to show they are talking to each other, saying, “Everything is fine.” [Newsweek, 12/3/2001] Later, passenger phone calls will describe two dead or injured bodies just outside the cockpit; presumably these are the two pilots. [New York Times, 7/22/2004]

Entity Tags: Cleveland Air Route Traffic Control Center, John Werth, 9/11 Commission, Jason Dahl

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Shortly before Flight 93 reverses direction and heads east, someone in its cockpit radios in and asks the FAA for a new flight plan, with a final destination of Washington, DC. [ABC News, 9/11/2001; ABC News, 9/14/2001] Jeff Krawczyk, the chief operating officer of a company that tracks aircraft movements, later comments, “We hardly ever get a flight plan change. Very unusual.” [Washington Business Journal, 9/11/2001] Who it is that makes this request is unclear. The hijacker takeover of Flight 93 occurred around 9:28 a.m. (see (9:28 a.m.) September 11, 2001) [9/11 Commission, 7/24/2004, pp. 11] , so it is presumably made by one of the hijackers. Twenty-five minutes later the pilot hijacker will also program a new destination into the plane’s navigational system (see 9:55 a.m. September 11, 2001).

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The traffic management unit (TMU) at the FAA’s Boston Center calls NORAD’s Northeast Air Defense Sector (NEADS) to ask whether military planes out on training should be sent home. Boston Center asks, “The military aircraft that are in the air right now, we’re wondering if we should tell them to return to base if they’re just on training missions, or what you guys suggest?” NEADS replies, “No, they’re actually on the active air for the DO [director of operations] out there,” but adds, “We did send the ones home in 105 that were on the training mission.” This is presumably a reference to some fighters from Otis Air National Guard Base that were training in “Whiskey 105,” which is military training airspace southeast of Long Island (see (9:15 a.m.-9:35 a.m.) September 11, 2001). Boston Center mentions that there are other military aircraft still airborne for training, and asks, “In general, anybody that’s training?” After consulting with colleagues, the member of staff at NEADS tells Boston, “Yes, go ahead and send them home.” [North American Aerospace Defense Command, 9/11/2001] NEADS was involved in a major training exercise this morning, though this was reportedly canceled shortly after the second WTC tower was hit (see (Shortly After 9:03 a.m.) September 11, 2001). [Newhouse News Service, 1/25/2002; Airman, 3/2002]

Entity Tags: Northeast Air Defense Sector, Boston Air Route Traffic Control Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

As part of a NORAD training exercise, a simulated plane hijacking was scheduled to occur around this time. It was to have been based around politically motivated perpetrators taking command of an aircraft, landing it on a Cuba-like island, and seeking asylum there. The hijacking was one of several simulated scenarios prepared for the day. Details of the other scenarios are unknown. Major Kevin Nasypany, the mission crew commander at NORAD’s Northeast Air Defense Sector (NEADS) who’d helped designed the exercise, initially thought the reports of Flight 11 being hijacked were because “Somebody started the exercise early.” [Vanity Fair, 8/1/2006] The exercise was canceled after the second plane hit the World Trade Center (see (Shortly After 9:03 a.m.) September 11, 2001).

Entity Tags: Vigilant Guardian, Kevin Nasypany, North American Aerospace Defense Command, Northeast Air Defense Sector

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Todd Beamer. [Source: Family photo]After having trouble getting authorization on an Airfone to call his family (see 9:43 a.m. September 11, 2001), Flight 93 passenger Todd Beamer is able to speak to GTE customer service supervisor Lisa Jefferson. Jefferson, who quickly alerts the FBI about Beamer’s call, talks to him for 13 minutes. According to a report in the London Observer, she has the FBI simultaneously on another line, offering guidance. She immediately asks Beamer for details of the flight, like “What is your flight number? What is the situation? Where are the crew members?” With the help of a flight attendant sitting next to him, Beamer details the numbers of passengers and crew on the plane. He says the hijackers have divided the passengers into two groups, with ten of them in first class at the front of the plane, and 27 in the back. (Jefferson’s written summary of the conversation will say that the larger number of passengers was in the front. However, Beamer’s wife later says that Jefferson informed her it was in fact the other way around.) According to some reports, Beamer says three people have hijacked the plane. Two of them, armed with knives, are in the cockpit and have locked the door; the third is in first class with what appears to be a bomb strapped around his waist. A curtain has been closed separating first class from the coach section of the plane. Other accounts claim the hijacker with the bomb is in fact in the rear of the plane. According to one report in the Pittsburgh Post-Gazette, Beamer describes four hijackers in total: the two in the cockpit, the one with the bomb guarding the passengers in the back of the plane, and a fourth in first class. But the Orlando Sentinel says Beamer tells Jefferson he is free to talk because the hijacker in first class has closed the curtain, indicating there is no hijacker at the back of the plane. (Beamer himself is at the back of plane, calling from a phone in row 32.) According to an early article in Newsweek, he says that one passenger is dead and he doesn’t know about the pilots. However, journalist and author Jere Longman later writes that Beamer describes to Jefferson two people on the floor in fist class, possibly dead. The flight attendant next to him can be overheard saying these are the plane’s captain and co-pilot. The attendant does not mention their names or say they are wearing uniforms, but she sounds certain. Beamer then repeats what the attendant has told him. At some point in the call, Beamer asks, “Do you know what [the hijackers] want? Money or ransom or what?” He seems unaware of the other hijackings that have occurred. Jefferson informs him of the two planes crashing in New York. [Chicago Tribune, 9/16/2001; Pittsburgh Post-Gazette, 9/19/2001; Newsweek, 9/22/2001; Pittsburgh Post-Gazette, 9/22/2001; Pittsburgh Post-Gazette, 10/28/2001; Observer, 12/2/2001; Longman, 2002, pp. 198-200; Orlando Sentinel, 9/5/2002; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 11 ] Beamer says of the hijackers, “It doesn’t seem like they know how to fly the plane.” [San Francisco Chronicle, 9/17/2001] He also tells Jefferson about himself, including where he is from, that he has two sons, and that his wife is expecting a third child in January. [Pittsburgh Post-Gazette, 9/22/2001] He tells her, “I just want to talk to somebody and just let someone know that this is happening.” [Longman, 2002, pp. 204]

Entity Tags: Federal Bureau of Investigation, Lisa Jefferson, Todd Beamer

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The military liaison at the FAA’s Cleveland Center calls NORAD’s Northeast Air Defense Sector (NEADS) and alerts it to the hijacked Flight 93. According to the 9/11 Commission, this is the first notification NEADS receives about Flight 93, but it comes too late, since the plane has already crashed (see (10:06 a.m.) September 11, 2001). [9/11 Commission, 7/24/2004, pp. 30; 9/11 Commission, 8/26/2004, pp. 46 ]
'Bomb on Board' Flight 93 - At 10:05 a.m., the military liaison at the Cleveland Center, who is unaware that Flight 93 has just crashed, calls NEADS to inform it that Flight 93 is heading toward Washington, DC. Even though communicating with NEADS is not one of his responsibilities, he wants to make sure it is in the loop. [Spencer, 2008, pp. 224] At NEADS, the call is answered by Tech Sergeant Shelley Watson. Shortly into the call, at 10:07, the military liaison tells her: “We got a United 93 out here. Are you aware of that?” He continues, “That has a bomb on board.” Watson asks: “A bomb on board? And this is confirmed? You have a mode three [beacon code], sir?” The military liaison replies, “No, we lost his transponder” (see (9:40 a.m.) September 11, 2001). The news about Flight 93 is shouted out to Major Kevin Nasypany, the NEADS mission crew commander. Nasypany responds: “Gimme the call sign. Gimme the whole nine yards.… Let’s get some info, real quick. They got a bomb?”
Liaison Wants Fighters Sent toward Flight 93 - The military liaison continues, asking Watson if NEADS scrambled fighter jets in response to Delta 1989, an aircraft that was mistakenly reported as having been hijacked (see (9:28 a.m.-9:33 a.m.) September 11, 2001 and 9:39 a.m. September 11, 2001). Watson replies: “We did. Out of Selfridge and Toledo” (see (9:55 a.m.) September 11, 2001 and 10:01 a.m. September 11, 2001), and says these jets are airborne. When the military liaison asks if the fighters can be directed to where Flight 93 is, Watson asks him if the Cleveland Center has latitude and longitude coordinates for this aircraft. The military liaison replies that he has not got this information available right now. All he knows is that Flight 93 has “got a confirmed bomb on board… and right now, his last known position was in the Westmoreland area.… Which is… in the Pittsburgh, Pennsylvania, area.” [North American Aerospace Defense Command, 9/11/2001; Vanity Fair, 8/1/2006]
NEADS Searches on Radar - The news of a bomb on board Flight 93 spreads quickly at NEADS, and personnel there search for the aircraft’s primary return on their radar screens. But because the plane has already crashed, they will be unable to locate it. NEADS will only learn that Flight 93 has crashed at 10:15 a.m., during a call with the FAA’s Washington Center (see 10:15 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 30-31]
FAA Failed to Notify Military Earlier - The Cleveland Center’s notification to NEADS about Flight 93 comes 39 minutes after the plane was hijacked (see (9:28 a.m.) September 11, 2001) and 33 minutes after FAA headquarters was alerted to the hijacking (see 9:34 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 11, 28] At the time NEADS is alerted to Flight 93, NORAD is similarly uninformed about this aircraft, according to the 9/11 Commission. The Commission will state, “At 10:07, its representative on the air threat conference call stated that NORAD had ‘no indication of a hijack heading to DC at this time.’” According to the Commission, the National Military Command Center (NMCC) at the Pentagon learned about the Flight 93 hijacking slightly earlier on, at 10:03 a.m. (see 10:03 a.m. September 11, 2001). However, the NMCC was notified by the White House, not the FAA. [9/11 Commission, 7/24/2004, pp. 42] A former senior FAA executive, speaking on condition of anonymity, will later try to explain why it takes the FAA so long to alert NEADS to Flight 93. He will say, “Our whole procedures prior to 9/11 were that you turned everything [regarding a hijacking] over to the FBI.” [Vanity Fair, 8/1/2006] Yet military instructions contradict this, stating, “In the event of a hijacking, the NMCC will be notified by the most expeditious means by the FAA.” [US Department of Defense, 7/31/1997 ; US Department of Defense, 6/1/2001 ]
NORAD Commanders Claim Earlier Awareness of Flight 93 - Two senior NORAD officials will contradict the 9/11 Commission’s conclusion, and claim they were aware of Flight 93 well before it crashed (see Before 9:36 a.m. September 11, 2001 and (9:36 a.m.-10:06 a.m.) September 11, 2001). [Filson, 2003, pp. 68, 71-73] Colonel Robert Marr, the NEADS battle commander, will tell the Commission that, while the flight was still airborne, “his focus was on UAL 93, which was circling over Chicago,” and he “distinctly remembers watching the flight UAL 93 come west, and turn over Cleveland.” [9/11 Commission, 10/27/2003 ; 9/11 Commission, 1/23/2004 ] Major General Larry Arnold, the commander of the Continental US NORAD Region, will recall, “[W]e watched the [Flight] 93 track as it meandered around the Ohio-Pennsylvania area and started to turn south toward DC.” [Filson, 2003, pp. 71]

Entity Tags: Cleveland Air Route Traffic Control Center, Kevin Nasypany, North American Aerospace Defense Command, Northeast Air Defense Sector, Shelley Watson

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Tape recordings of the operations floor at NORAD’s Northeast Air Defense Sector (NEADS) indicate that some military personnel are uncertain whether a training exercise that was being conducted on this day has been canceled. NEADS has been participating in a major exercise called Vigilant Guardian. [Newhouse News Service, 1/25/2002] This was reportedly called off “shortly after” the second WTC tower was hit at 9:03 (see (Shortly After 9:03 a.m.) September 11, 2001). [Airman, 3/2002] But at 10:06, someone calls NEADS and asks, “Is the exercise knocked off?” to which they are told, “Yes.” Two minutes later, a member of the NEADS staff is heard saying, “If this is an exercise input, this is a good one.” [North American Aerospace Defense Command, 9/11/2001] It is around this time that NEADS is first alerted to Flight 93 (although this plane has already crashed) (see 10:05 a.m.-10:08 a.m. September 11, 2001) and also hears a report of an unidentified aircraft over the White House (see 10:07 a.m. September 11, 2001). So presumably it is one of these incidents that is considered a possible “exercise input,” meaning a simulated scenario. [Vanity Fair, 8/1/2006]

Entity Tags: Northeast Air Defense Sector

Timeline Tags: Complete 911 Timeline, 9/11 Timeline