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Context of '1999: Air Force Study Warns against Neglecting Air Sovereignty; Threat of Terrorism Highlighted'

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The NORAD emblem.The NORAD emblem. [Source: NORAD]The North American Aerospace Defense Command (NORAD), the military organization responsible for monitoring and defending US airspace, gradually reduces the number of aircraft it has on “alert”—armed and ready for immediate takeoff—in response to the changing nature of the threats it has to defend against, so that there will be just 14 fighter jets on alert across the continental United States when the 9/11 attacks take place. [Jones, 2011, pp. 7-8 pdf file]
NORAD Has 1,200 Interceptor Aircraft in 1960 - NORAD is a bi-national organization, established by the US and Canada in 1958 to counter the threat posed by the Soviet Union. [9/11 Commission, 7/24/2004, pp. 16] It is initially responsible for intercepting any Soviet long-range bombers that might attack the Northern Hemisphere. By 1960, it has about 1,200 interceptor aircraft dedicated to this task. But during the 1960s, the Soviets become less reliant on manned bombers, and shift instead to ballistic missiles. In response to this changed threat and also budget constraints, the number of NORAD interceptor aircraft goes down to about 300 by the mid-1970s.
NORAD's Mission Changes after Cold War Ends - With the collapse of the Soviet Union and the dissolution of the Warsaw Pact in 1991, the threats NORAD has to counter change significantly. During the early 1990s, NORAD’s mission consequently changes from one of air defense to one of maintaining “air sovereignty,” which NORAD defines as “providing surveillance and control of the territorial airspace.” The new mission includes intercepting suspicious aircraft, tracking hijacked aircraft, assisting aircraft in distress, and counterdrug operations. [General Accounting Office, 5/3/1994, pp. 14-15; 9/11 Commission, 2/3/2004 pdf file; Jones, 2011, pp. 7 pdf file] As this change takes place, the number of aircraft defending American airspace is reduced. In 1987, there are 52 fighters on alert in the continental United States. [Filson, 1999, pp. 112-113] But by December 1999, there are just 14 alert fighters remaining around the continental US. [Airman, 12/1999]
Number of Alert Sites Goes Down Prior to 9/11 - The number of NORAD “alert sites”—bases where the alert aircraft are located—is also reduced in the decades prior to 9/11. During the Cold War, there are 26 of these sites. [9/11 Commission, 6/17/2004; 9/11 Commission, 7/24/2004, pp. 16] By 1991, there are 19 of them, according to Major General Larry Arnold, the commander of NORAD’s Continental US Region from 1997 to 2002. [Filson, 2003, pp. v] By 1994, according to a report by the General Accounting Office, there are 14 alert sites around the US. [General Accounting Office, 5/3/1994, pp. 1] And by 1996, only 10 alert sites remain. [Utecht, 4/7/1996, pp. 9-10]
Military Officials Call for Eliminating Alert Sites - In the 1990s, some officials at the Pentagon argue for the alert sites to be eliminated entirely. [9/11 Commission, 7/24/2004, pp. 16-17] The Department of Defense’s 1997 Report of the Quadrennial Defense Review indicates that the number of alert sites around the continental US could be reduced to just four, but the idea is successfully blocked by NORAD (see May 19, 1997). [Filson, 2003, pp. iv-v, 34-36; 9/11 Commission, 2/3/2004 pdf file] However, three alert sites are subsequently removed from the air sovereignty mission. These are in Atlantic City, New Jersey; Burlington, Vermont; and Great Falls, Montana. [American Defender, 4/1998]
Seven Alert Sites Remain - By December 1999, therefore, there are just seven alert sites around the continental US, each with two fighters on alert. These sites are Homestead Air Reserve Base, Florida; Tyndall Air Force Base, Florida; Portland Air National Guard Base, Oregon; March Air Reserve Base, California; Ellington Air National Guard Base, Texas; Otis Air National Guard Base, Massachusetts; and Langley Air Force Base, Virginia. Only two of these sites—Otis ANGB and Langley AFB—serve the northeastern United States, where the hijackings on September 11 will take place. [Airman, 12/1999; 9/11 Commission, 7/24/2004, pp. 17]

Entity Tags: North American Aerospace Defense Command, Larry Arnold

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

William Cohen.William Cohen. [Source: US Department of Defense]Secretary of Defense William Cohen issues a comprehensive assessment of America’s defense requirements, called the Report of the Quadrennial Defense Review (QDR). This is a six-month analysis of the “threats, risks and opportunities for US national security,” and reviews all aspects of the US defense strategy. [US Department of Defense, 5/19/1997] Among other things, the 1997 QDR outlines the conversion of six continental air defense squadrons to general purpose, training or other missions. It calls for there being just four “alert” air defense sites around the US: at Otis, Massachusetts; Homestead, Florida; Riverside, California; and Portland, Oregon. [US Department of Defense, 5/1997; Filson, 2003, pp. 348] Major General Larry Arnold, who is commanding general of NORAD’s Continental Region on 9/11, later says: “The QDR didn’t make any sense at all. [T]here was a fight just to maintain the number of alert sites that we had. We felt we could operate fairly reasonably with about ten sites and thought eight was the absolute highest risk we could take.” NORAD Commander in Chief General Howell M. Estes III has written to the Joint Chiefs of Staff that a minimum of seven alert sites are needed to maintain America’s air sovereignty. In the end, three extra alert sites are added to the four suggested in the QDR. These are at Hampton, Virginia; Panama City, Florida; and Ellington, Texas. Larry Arnold later says, “I didn’t feel particularly comfortable with seven [alert sites] because there are great large distances between the alert sites.” [Filson, 2003, pp. 36] Other bases will lose their NORAD air defense functions over the next year, including those in Fresno, California; Fargo, North Dakota; Duluth, Minnesota; Burlington, Vermont; Atlantic City, New Jersey; and Great Falls, Montana. [US Department of Defense, 5/1997] Of these closed bases, the most critical loss on 9/11 will be the Atlantic City, New Jersey base, located about halfway between New York City and Washington. Boston air traffic control, apparently unaware the base has lost its air defense function will try and fail to contact the base shortly after learning about the first hijacking of the morning, Flight 11 (see (8:34 a.m.) September 11, 2001).

Entity Tags: Howell M. Estes III, Larry Arnold, William S. Cohen

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Major General Larry Arnold, who became commander of the Continental United States NORAD Region (CONR) in December 1997, fights to preserve the resources assigned to US air sovereignty (see May 19, 1997 and Late August 2001). To emphasize the need for air bases with fighter jets on alert, Arnold frequently gives a presentation describing “asymmetric” threats and including a slide featuring Osama bin Laden. As Arnold will later recall: “[W]e thought that the biggest threat to the US in the briefing that I always gave… was going to come from an asymmetric threat, from a terrorist or a rogue nation, or maybe associated with the drug cartels to some degree. The picture that we used to have on one of our slides there, dating all the way back to 1997 and 1998, was Osama bin Laden.” [Filson, 2002] Colonel Alan Scott, who serves under Arnold at CONR, will later describe the “El Paso example” that Arnold uses to illustrate the need for more alert sites. Scott says: “We had fairly large gaps between our seven alert sites pre-9/11. The largest was between Riverside, CA, and Houston, TX. El Paso, TX, was in the middle of those two alert sites. There was no perceived ‘military’ threat from Mexico. As the threat of terrorism arose, General Arnold began to use the example in his talks to various groups. The example was that if a terrorist called and said in one hour he would overfly El Paso, TX, and spray deadly gas, we would watch it live on CNN because we could not get aircraft to that location in time to stop the attack.” [Filson, 7/14/2002]

Entity Tags: Larry Arnold, North American Aerospace Defense Command, Alan Scott

Timeline Tags: Complete 911 Timeline

As the military community is discussing the future of continental air defense in a post-Cold War world (see May 19, 1997), Major General Larry Arnold, the commander of the 1st Air Force, orders a study to review the Air Force’s air sovereignty mission. At his request, Major General Paul Pochmara forms a 12-member roles and mission (RAM) team to gather information and ideas on the subject. The team has a one-hour presentation that outlines the military’s responsibility for protecting the nation’s air sovereignty. Major General Mike Haugen, a member of the team, will later say that the group discusses everything from technology to the future of the air sovereignty mission to the terrorist threat. Haugen will say: “We made some pretty bold predictions in our briefing.… In fact, it included a photo of Osama bin Laden as the world’s most dangerous terrorist.… We didn’t predict how the terrorists would strike but predicted they would strike.” [Filson, 2003, pp. 37-38] A 9/11 Commission memorandum will add, “Osama bin Laden is featured on the cover of the brief developed by the RAM team, and he figures prominently in the study.” Colonel Alan Scott of the Continental US NORAD Region will tell the Commission: “As we started talking about Osama bin Laden, the examples we gave in our mission brief were the first WTC bombing, the Tokyo subway, Oklahoma City bombing, and Atlanta Olympics. What we did was connect those dots. The conclusion we drew was that we had a viable threat.” [9/11 Commission, 6/9/2004]

Entity Tags: Mike Haugen, Paul Pochmara, Alan Scott, Larry Arnold, North American Aerospace Defense Command, 1st Air Force

Timeline Tags: Complete 911 Timeline

Major General Larry Arnold, the commander of the 1st Air Force whose mission includes the protection of the continental US against air attacks, tells the Associated Press that he is deeply worried by the possibility of an airborne terrorist attack. He says: “I lie awake worrying. It is one thing to put a truck inside the twin trade towers and blow it up. It is quite another to be able to fly a weapon across our borders. That is an attack, a direct attack, an unambiguous attack from outside our country.” In 1999, a study commissioned by Arnold emphasized the continued importance of the Air Force’s air sovereignty mission and the threat of terrorism (see 1999). [Associated Press, 2/1/2000; Associated Press, 8/2/2002; Filson, 2003, pp. 92] As one of the top commanders of NORAD, Arnold will play a pivotal role on the morning of 9/11 (see (8:42 a.m.) September 11, 2001, (10:08 a.m.-10:10 a.m.) September 11, 2001, and 10:31 a.m. September 11, 2001). [Code One Magazine, 1/2002; 9/11 Commission, 7/24/2004, pp. 20, 42]

Entity Tags: Larry Arnold

Timeline Tags: Complete 911 Timeline

Major General Larry Arnold, the commander of the Continental United States NORAD Region (CONR), struggles to maintain funding for a plan to defend against a cruise missile attack by terrorists. Arnold has long been worried by the US’s vulnerability to an airborne attack by terrorists (see 1999 and February 2000). But, as he will later recount, not everyone shares his concern. He will say: “Just two weeks before September 11, 2001, I had met with Vice Admiral Martin Mayer, the deputy commander in chief of Joint Forces Command located in Norfolk, Virginia. He had informed me that he intended to kill all funding for a plan my command had been working on for two years, that would defend against a cruise missile attack by terrorists. While I convinced Admiral Mayer to continue his funding support, he told me in front of my chief of staff, Colonel Alan Scott; Navy Captain David Stewart, the lead on the project; and my executive officer, Lt. Col. Kelley Duckett, that our concern about Osama bin Laden as a possible threat to America was unfounded and that, to repeat, ‘If everyone would just turn off CNN, there wouldn’t be a threat from Osama bin Laden.’” [Spencer, 2008, pp. 289]

Entity Tags: David Stewart, Alan Scott, Kelley Duckett, Larry Arnold, Osama bin Laden, Martin Mayer

Timeline Tags: Alleged Use of False Flag Attacks

Apparently around 8:34 a.m., the FAA’s Boston Center attempts to contact an Atlantic City, New Jersey, military unit, to have it send fighters after Flight 11. However, the outcome of this call, and whether it is even answered, is unclear. [9/11 Commission, 7/24/2004, pp. 20] Atlantic City International Airport is the home of the 177th Fighter Wing of the New Jersey Air National Guard, which flies F-16 fighter jets. The 177th FW was part of NORAD’s alert force for many years, and kept two F-16s constantly on alert, ready to scramble when requested. But in October 1998, as a result of Pentagon cutbacks, it lost its scramble-ready status and began converting to a general-purpose F-16 mission (see May 19, 1997). [Bergen Record, 12/5/2003; GlobalSecurity (.org), 8/21/2005] The outcome of Boston Center’s attempt at contacting the Atlantic City unit is unclear. The 9/11 Commission will only state, “The center… tried to contact a former alert site in Atlantic City, unaware it had been phased out.” [9/11 Commission, 7/24/2004, pp. 20] NORAD’s Northeast Air Defense Sector (NEADS) will also try contacting the unit minutes later, but its call will not be answered (see (Between 8:40 a.m. and 8:46 a.m.) September 11, 2001). [Spencer, 2008, pp. 34] The Bergen Record will later comment that, with the removal of the Atlantic City fighters from NORAD’s alert mission, “the Pentagon left what seems to be a yawning gap in the midsection of its air defenses on the East Coast—a gap with New York City at the center.” [Bergen Record, 12/5/2003] Around this time, two F-16s from the 177th FW are away from base performing a training mission, and are just minutes from New York City, but the pilots are unaware of the unfolding crisis (see 8:46 a.m.-9:03 a.m. September 11, 2001).

Entity Tags: Boston Air Route Traffic Control Center, 177th Fighter Wing

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

The 177th Fighter Wing, a military unit based at the Atlantic City International Airport in New Jersey, raises its threat protection level to a wartime posture, and, though it is no longer part of NORAD’s alert mission, starts preparing to launch its aircraft with live missiles. [Spencer, 2008, pp. 120-122]
Commander Orders Increased Threat Condition - Lt. Col. Brian Webster, who is the acting wing commander for the 177th Fighter Wing, was at home when he learned of the attacks on the World Trade Center. After watching the second attack live on television, he rushes out to drive to the base. Webster calls the command post there on his cell phone and gives the order, “Raise the base’s threat protection level to Charlie!” Threatcon Charlie is a wartime posture, and will mean various security measures are activated in preparation for a possible attack. [Spencer, 2008, pp. 120-121]
Command Post Brought Online - For many years, up to 1998 (see May 19, 1997), the 177th FW was part of NORAD’s alert force. It kept two fully armed F-16s on constant alert, and was responsible for providing air sovereignty of the mid-Atlantic, between Long Island, New York, and the Virginia Capes. [New Jersey Department of Military and Veterans Affairs, 1999 pdf file; Bergen Record, 12/5/2003; GlobalSecurity (.org), 8/21/2005] But since the unit was removed from the NORAD alert mission, its command post has been used just once a month for training. It is now coming to life, though, as personnel switch on the lights, and turn on computers and monitors. The workers increase their pace after hearing an announcement about the transition to Threatcon Charlie. A master sergeant busily calls members of staff and orders them to report to base.
Webster Wants Live Missiles on Aircraft - When Webster arrives, he instructs the operations support flight commander to replace practice missiles and munitions on the unit’s fighter jets with live ones. The missiles are not stored by the aircraft, so this will take some time. Webster also orders, “Get me authenticators.” An authenticator is a piece of paper given to pilots with a code in a series of letters on it, and which is only valid for a 24-hour period. If a pilot receives an order to fire, he must ask for an authentication code. If this doesn’t match the code on his authenticator, he cannot legally comply with the order. NORAD’s alert sites receive authenticators each month, but as it is no longer part of the alert mission, Atlantic City has none.
Weapons Chief Uncertain - According to author Lynn Spencer, Webster’s orders are unprecedented at a non-alert fighter wing of the Air National Guard. “Air National Guard jets don’t simply fly around the United States with live missiles. Guardsmen train to fight wars overseas, not to fly armed combat over the United States.” The weapons chief with the 177th FW is unenthusiastic, and asks to have a word with Webster. But Webster tells him abruptly, “Just do it![Spencer, 2008, pp. 121-122] Within two hours, the first fighters will take off from the Atlantic City unit. These had been preparing for a training mission at the time of the attacks in New York (see (Shortly After 9:03 a.m.) September 11, 2001). [Code One Magazine, 10/2002]

Entity Tags: 177th Fighter Wing, Brian Webster

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Two senior NORAD officials, Colonel Robert Marr and Major General Larry Arnold, have to address the possibility of issuing shootdown authorization to fighter jets under their command, after a report is received about an aircraft over the White House. [Spencer, 2008, pp. 224-225]
Aircraft over White House - Marr, the battle commander at NORAD’s Northeast Air Defense Sector (NEADS) in Rome, New York, is in the NEADS battle cab. On the NEADS operations floor, mission crew commander Major Kevin Nasypany has just learned of a report of an aircraft flying over the White House (see 10:07 a.m. September 11, 2001), and now talks to Marr over the phone. Nasypany asks: “Okay, did you hear that? Aircraft over the White House. What’s the word? Intercept and what else?” Marr has a phone to each ear and does not hear what Nasypany says. Nasypany therefore repeats, “Aircraft… over… the White House!” pausing on each word for emphasis. [Vanity Fair, 8/1/2006; Spencer, 2008, pp. 224]
Commanders Discuss Shootdown Order - The news of an aircraft over the White House forces Marr and Arnold, with whom he has been communicating, to address the issue of authorizing the shooting down of aircraft. [Spencer, 2008, pp. 225] Arnold, the commander of NORAD’s Continental US Region (CONR), is at the CONR air operations center at Tyndall Air Force Base in Florida. [Code One Magazine, 1/2002] According to author Lynn Spencer, he has not yet received any instructions from his higher-ups regarding shootdown authorization. “He talked to Major General Rick Findley,” who is at NORAD’s operations center in Colorado, “and asked him to get shootdown authority from the vice president, but he’s still heard nothing back.” [Spencer, 2008, pp. 225]
Arnold Possibly Authorizes Shootdown - Arnold will later tell author Leslie Filson that he has “the authority in case of an emergency to declare a target hostile and shoot it down under an emergency condition.” [Filson, 2003, pp. 75] But according to Vanity Fair, he only passes the current request for rules of engagement further up his chain of command. [Vanity Fair, 8/1/2006] However, Spencer will claim otherwise, stating, “In light of the imminent attack on the White House,” Arnold “decides he will exercise the authority he has to protect the nation in an emergency.” He tells Marr: “We will intercept and attempt to divert. If we can’t, then we’ll shoot it down.” [Spencer, 2008, pp. 225]
Alleged Shootdown Authorization Not Passed On - Minutes later, though, Nasypany will tell his staff that the pilots that took off from Langley Air Force Base (see (9:25 a.m.-9:30 a.m.) September 11, 2001) have “negative clearance to shoot” aircraft over Washington (see 10:10 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 31] And according to the 9/11 Commission, NEADS only learns that NORAD has been given clearance to shoot down threatening aircraft at 10:31 a.m., and even then it does not pass this order along to the fighter pilots under its command (see 10:31 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 42-43]

Entity Tags: Larry Arnold, Northeast Air Defense Sector, Kevin Nasypany, Robert Marr

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The Continental United States NORAD Region (CONR) issues a message to its three air defense sectors—including the Northeast Air Defense Sector (NEADS)—stating that Vice President Dick Cheney has authorized it to shoot down suspicious aircraft.
Order Sent over Computer Chat System - About 15 minutes earlier, a military officer at the White House relayed to the Pentagon’s National Military Command Center (NMCC) that Cheney had confirmed that fighter jets were cleared to engage an inbound aircraft if they could verify that the aircraft was hijacked (see 10:14 a.m.-10:19 a.m. September 11, 2001). According to the 9/11 Commission, “It is not clear how [this] shootdown order was communicated within NORAD.” However, Major General Larry Arnold, the CONR commander, now instructs his staff to broadcast a message over a NORAD computer chat system, passing on Cheney’s authorization. The message states, “10:31 Vice president has cleared to us to intercept tracks of interest and shoot them down if they do not respond, per CONR CC [General Arnold].” The message is received at CONR’s three air defense sectors: the Western, Southeast, and Northeast. [9/11 Commission, 7/24/2004, pp. 42; Spencer, 2008, pp. 240]
Arnold Could Issue Shootdown Order Himself - Arnold, who is at the CONR air operations center at Tyndall Air Force Base in Florida, will later comment, “I have the authority in case of an emergency to declare a target hostile and shoot it down under an emergency condition… but it was comforting to know we legally had the authority from the president of the United States.” [Filson, 2002; Code One Magazine, 1/2002; Filson, 2003, pp. 75-76] The 10:31 chat message is the first notification personnel on the NEADS operations floor receive of the shootdown order. These personnel are reportedly confused over the order and do not pass it on to fighter pilots under their command (see 10:32 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 42-43; 9/11 Commission, 8/26/2004, pp. 47]

Entity Tags: Continental US NORAD Region, Southeast Air Defense Sector, Western Air Defense Sector, Larry Arnold, Northeast Air Defense Sector

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

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