The North American Aerospace Defense Command (NORAD) conducts an exercise, called Vigilant Virgo 99-1, in which simulated missiles are injected into its radar systems, apparently similar to the way simulated information will be injected onto its radar screens for a training exercise on the morning of September 11, 2001. [US Department of Defense, 1/15/1999; Toronto Star, 12/9/2001; Arkin, 2005, pp. 546] In August 1998, Secretary of Defense William Cohen directed the commanders in chief who are responsible for the Department of Defense’s unified combatant commands to plan, carry out, and report on a series of simulated Year 2000 “operational evaluations.” [United States General Accounting Office, 6/1999, pp. 8 
; United States General Accounting Office, 11/1999, pp. 15 ] Vigilant Virgo is the first in a series of NORAD operational evaluations that are going to be held in response to this order. [US Department of Defense, 1/15/1999; United States General Accounting Office, 6/1999, pp. 2 ; Military Operations Research Society, 6/22/1999, pp. 193 ]
Exercise Tests NORAD’s Year 2000 Preparedness – The three-day exercise is intended to evaluate if NORAD’s systems are vulnerable to the Year 2000 (Y2K) computer problem, which would be caused by computers being unable to properly read dates at the start of the new millennium. [US Department of Defense, 1/15/1999; New York Times, 2/9/1999] It evaluates the capability of NORAD’s systems to track and forward information about missile and space air threats when the command’s clocks are rolled forward to January 1, 2000. [United States General Accounting Office, 6/1999, pp. 8-9 ] The exercise is a collaborative effort in which NORAD is supported by personnel, equipment, and facilities belonging to the US Space Command and the US Strategic Command. [US Department of Defense, 1/14/1999; US Department of Defense, 1/15/1999]
‘Missile Events’ Are Injected into NORAD’s Sensors – Vigilant Virgo focuses on the missile warning element of NORAD’s integrated tactical warning and attack assessment function. [United States General Accounting Office, 6/1999, pp. 11 ; Military Operations Research Society, 6/22/1999, pp. 193 ] It involves “well over 30 missile events” being “injected” into NORAD’s sensors, according to Lieutenant Colonel Warren Patterson, a member of the Joint Staff Year 2000 Task Force. These simulated events involve data that is injected “as though it [is] being sensed for the first time by a radar site,” Deputy Secretary of Defense John Hamre will later describe. Some of the simulations involve mass attacks, while others involve attacks by a single missile. [US Department of Defense, 1/15/1999] The Y2K preparedness of the entire ground radar array network is analyzed during the exercise. [Bulletin of the Atomic Scientists, 3/1999]
Exercise Finds No Vulnerabilities in NORAD’s Systems – Vigilant Virgo will be considered a success. The exercise will find that there is “no degradation in any of the systems, whether they were in the Year 2000 environment, the virtual Year 2000 environment, or whether they were in the real world, 1998 environment,” Patterson will say. “We are highly confident now, at this point, that CINC [commander in chief] NORAD can do his early warning mission,” he will conclude. [US Department of Defense, 1/15/1999]
Exercise on 9/11 Will Use Simulated Radar Information – NORAD is the military organization responsible for monitoring and defending North American airspace. [9/11 Commission, 7/24/2004, pp. 16; Department of National Defence, 7/25/2017] Personnel at its Northeast Air Defense Sector (NEADS), based in Rome, New York, will be responsible for coordinating the military’s response to the 9/11 hijackings. [Shenon, 2008, pp. 203] It will be conducting an exercise on the morning of September 11, 2001, which, like Vigilant Virgo, involves simulated information being injected onto its radar screens (see (9:00 a.m.) September 11, 2001, 9:34 a.m. September 11, 2001, and 10:12 a.m. September 11, 2001). [Toronto Star, 12/9/2001] NORAD will conduct a follow-on exercise to Vigilant Virgo from February 15 to February 28, 1999, called Amalgam Virgo 99-2, which will involve a comprehensive evaluation of its systems for aerospace control, air warning, missile warning, and space warning. [United States General Accounting Office, 6/1999, pp. 11 ; Arkin, 2005, pp. 253-254] Whether that exercise will involve simulated information being injected onto radar screens is unclear.
8:30 a.m. September 11, 2001: US Military Holding ‘Practice Armageddon’ Nationwide Training Exercise
As the 9/11 attacks are taking place, a large military training exercise called Global Guardian is said to be “in full swing.” It has been going on since the previous week. [Omaha World-Herald, 2/27/2002; Omaha World-Herald, 9/10/2002] Global Guardian is an annual exercise sponsored by US Strategic Command (Stratcom) in cooperation with US Space Command and NORAD. One military author defines Stratcom as “the single US military command responsible for the day-to-day readiness of America’s nuclear forces.” [Arkin, 2005, pp. 59]
Exercise Tests Military’s Ability to Fight a Nuclear War – Global Guardian is a global readiness exercise involving all Stratcom forces and aims to test Stratcom’s ability to fight a nuclear war. It is one of many “practice Armageddons” that the US military routinely stages. [Bulletin of the Atomic Scientists, 11/1/1997; Associated Press, 2/21/2002; Omaha World-Herald, 2/27/2002; Omaha World-Herald, 9/10/2002] It links with a number of other military exercises, including Crown Vigilance (an Air Combat Command exercise), Apollo Guardian (a US Space Command exercise), and the NORAD exercises Vigilant Guardian and Amalgam Warrior. [US Department of Defense, 5/1997; GlobalSecurity (.org), 4/27/2005] Global Guardian is both a command post and a field training exercise, and is based around a fictitious scenario designed to test the ability of Stratcom and its component forces to deter a military attack against the US. Hundreds of military personnel are involved. [US Congress, n.d.; Collins Center Update, 12/1999 ; Times-Picayune, 9/8/2002] The exercise involves “a lot of the elements of what ultimately would be the nuclear command and control system in support of a national emergency,” according to Admiral Richard Mies, the commander in chief of Stratcom. It includes an “exercise secretary of defense” and “an exercise president.” Mies will say that because of the exercise, “A lot of [Stratcom’s] command and control systems that, in peacetime, are normally not on alert were at a much, much higher state of alert [on September 11] and we had a number of aircraft, manned control aircraft that were airborne that were simulating their wartime roles.” [NET News, 12/27/2011]
Exercise Normally Held in October or November – According to a 1998 Internet article by the British American Security Information Council—an independent research organization—Global Guardian is held in October or November each year. [Kristensen, 10/1998] In his book Code Names, NBC News military analyst William Arkin dates this exercise for October 22-31, 2001. [Arkin, 2005, pp. 379] And a military newspaper reported in March 2001 that Global Guardian was scheduled for October 2001. [Space Observer, 3/23/2001, pp. 2 ] If this is correct, then some time after March, the exercise must have been rescheduled for early September.
Exercise Includes a ‘Computer Network Attack’ – Furthermore, a 1998 Defense Department newsletter reported that for several years Stratcom had been incorporating a computer network attack (CNA) into Global Guardian. The attack involved Stratcom “red team” members and other organizations acting as enemy agents, and included attempts to penetrate the command using the Internet and a “bad” insider who had access to a key command and control system. The attackers “war dialed” the phones to tie them up and sent faxes to numerous fax machines throughout the Command. They also claimed they were able to shut down Stratcom’s systems. Reportedly, Stratcom planned to increase the level of computer network attack in future Global Guardian exercises. [IAnewsletter, 6/1998 ] It is unclear if a computer network attack is incorporated into Global Guardian in 2001.
8:45 a.m.-9:03 a.m. September 11, 2001: Stratcom Commander and Battle Staff Absent From Command Center Due to Visiting Business Leaders
At the time the attacks in New York occur, a small group of business leaders are having breakfast at Offutt Air Force Base in Omaha, Nebraska, where the US Strategic Command (Stratcom) is headquartered. With them is Admiral Richard Mies, the commander in chief of Stratcom. They are in town for an annual charity fundraiser event due to take place later in the day, hosted by the multi-billionaire Warren Buffett. Along with other visitors who have come for the fundraiser, they are scheduled to tour the Stratcom underground command center, located 60 feet below Offutt, and receive an unclassified mission briefing. According to the Omaha World-Herald, staff members have left the command center in advance of their visit. It is only after the second attack occurs, at 9:03, that Admiral Mies excuses himself from the breakfast and the battle staff reconvenes in the center. [San Francisco Business Times, 2/1/2002; Omaha World-Herald, 2/27/2002] It is unclear what effect the absence of Mies and the members of the battle staff have upon the military’s ability to respond effectively to the first attacks. However, the command center does have significant capabilities that would, presumably, be of much use under such a crisis. Stratcom is the military command responsible for the readiness of America’s nuclear forces. [Arkin, 2005, pp. 59] The Lincoln Journal Star describes its underground command center as “a military nerve center that collects and assesses information from high-tech ‘eyes and ears’ across—and above—the globe.” [Journal Star (Lincoln), 10/25/2000] The cavernous room has eight giant video screens and complex communications systems. [Associated Press, 2/21/2002; Omaha World-Herald, 2/27/2002] Stratcom itself states that the senior controller in the command center “has a direct line to the National Military Command Center in Washington, DC, and to the other major command headquarters.” This system, called the Joint Chiefs of Staff Alerting Network, allows the commander in chief of Stratcom to make “prompt contact with the president, the secretary of defense, the chairman of the Joint Chiefs of Staff, and other unified commanders.” Furthermore, “Through satellites and radio networks (VLF, LF, UHF and HF), the command center can communicate with aircraft in flight over any part of the world. A principal purpose of these networks is to pass National Command Authority [i.e. the president and secretary of defense] orders to the alert forces.” While only the president can order nuclear strikes, the commander in chief of Stratcom “can launch aircraft for survival.” [United States Strategic Command, 6/22/2001] With the command center’s sophisticated capabilities, after Mies returns to it from his breakfast, the eight video screens there are “loaded up with data,” providing him with “the latest information on the unfolding drama.” [Omaha World-Herald, 2/27/2002] And at the time President Bush arrives at Offutt, later in the day (see 2:50 p.m. September 11, 2001), the battle staff in the center will reportedly be “watching the skies over the United States” and “tracking a commercial airliner on its way from Spain to the United States.” [Washington Post, 1/27/2002; CBS News, 9/11/2002]
Before 9:00 a.m. September 11, 2001: Offutt Air Force Base in Nebraska Is Directing Global Guardian Training Exercise
Offutt Air Force Base, near Omaha, Nebraska, appears to be the headquarters of the US Strategic Command (Stratcom) exercise Global Guardian that is “in full swing” when the 9/11 attacks begin (see 8:30 a.m. September 11, 2001). At least the director of the exercise, Admiral Richard Mies, commander in chief of Stratcom, is at Offutt this morning. Because of Global Guardian, bombers, missile crews, and submarines around America are all being directed from Stratcom’s command center, a steel and concrete reinforced bunker below Offutt. [Bulletin of the Atomic Scientists, 11/12/1997; Associated Press, 2/21/2002; Omaha World-Herald, 2/27/2002; BBC, 9/1/2002; Omaha World-Herald, 9/10/2002] This bunker is staffed with top personnel and they are at a heightened security mode because of the exercise. [Associated Press, 2/21/2002; Air Force Weather Observer, 7/2002 ]
‘Doomsday’ Planes Airborne for Exercise – Because of Global Guardian, three special military command aircraft with sophisticated communications equipment, based at Offutt, are up in the air this morning (see (9:27 a.m.) September 11, 2001, Shortly After 9:37 a.m. September 11, 2001, and (9:45 a.m.) September 11, 2001). These E-4B National Airborne Operations Center planes—nicknamed “Doomsday” planes during the Cold War—are intended to control nuclear forces from the air in times of crisis. They are capable of acting as alternative command posts for top government officials from where they can direct US forces, execute war orders, and coordinate the actions of civil authorities in times of national emergency. The federal advisory committee, whose chairman is retired Lieutenant General Brent Scowcroft, is aboard one of these Doomsday planes, being brought to Offutt to observe the exercise (see (Shortly After 9:03 a.m.) September 11, 2001). Global Guardian will reportedly be put on pause at 9:11 a.m. (see 9:11 a.m. September 11, 2001), but not formally terminated until 10:44 a.m. (see (10:44 a.m.) September 11, 2001), and the battle staff at Offutt will switch to “real-world mode” once the attacks are apparent. However, even after Global Guardian is called off, the three E-4Bs will remain airborne. Also this morning, a small group of business leaders are at Offutt because of a charity fundraiser event due to take place later in the day, hosted by the multi-billionaire Warren Buffett (see (8:45 a.m.-9:03 a.m.) September 11, 2001). [Omaha World-Herald, 2/27/2002; Air Force Weather Observer, 7/2002 ; BBC, 9/1/2002; Omaha World-Herald, 9/8/2002; Bombardier, 9/8/2006 ]
9:11 a.m. September 11, 2001: Global Guardian Military Exercise Paused, but Apparently Not Yet Terminated
The US Strategic Command (Stratcom) orders that its Global Guardian exercise be put on pause at this time, according to a 2006 article in The Bombardier, the newspaper for Barksdale Air Force Base, Louisiana. [Bombardier, 9/8/2006 ] Global Guardian is an annual exercise sponsored by Stratcom, which has its headquarters at Offutt Air Force Base, Nebraska. The exercise tests Stratcom’s ability to fight a nuclear war (see 8:30 a.m. September 11, 2001). [Omaha World-Herald, 2/27/2002; GlobalSecurity (.org), 4/27/2005] Many aircraft and personnel at Barksdale, as well as other military bases, are involved in it (see 8:48 a.m. September 11, 2001). [Times-Picayune, 9/8/2002] Global Guardian will be formally terminated at 10:44 a.m., according to The Bombardier (see (10:44 a.m.) September 11, 2001), although other reports will say it is canceled earlier on, possibly after the second World Trade Center tower is hit at 9:03 a.m. [Omaha World-Herald, 2/27/2002; Omaha World-Herald, 9/8/2002; Bombardier, 9/8/2006 ]
10:44 a.m. September 11, 2001: Global Guardian Exercise Formally Canceled
The US Strategic Command (Stratcom) formally terminates its Global Guardian exercise at this time, according to a 2006 article in The Bombardier, the newspaper for Barksdale Air Force Base, Louisiana. Global Guardian was put on pause just over 90 minutes earlier, according to the same article (see 9:11 a.m. September 11, 2001). [Bombardier, 9/8/2006 ] However, other reports will suggest that Global Guardian was canceled significantly earlier than 10:44 a.m. One article in the Omaha World-Herald will state, “When the second World Trade Center tower was hit,” at 9:03 a.m., “the exercise was canceled, and the battle staff [at Offutt Air Force Base, Nebraska] moved to the real-world crisis.” [Omaha World-Herald, 9/8/2002] But an earlier article in the World-Herald will say that military authorities canceled Global Guardian “after the attacks on the World Trade Center towers and the Pentagon,” suggesting some time after 9:37 a.m., when the Pentagon was hit. [Omaha World-Herald, 2/27/2002] An E-4B National Airborne Operations Center aircraft that was involved in Global Guardian was reportedly only told to pull out of the exercise just after the Pentagon was hit (see (9:27 a.m.) September 11, 2001). [Verton, 2003, pp. 143-144] Even after Global Guardian is canceled, this plane and two other E-4Bs that are involved in the exercise will remain airborne. [Omaha World-Herald, 2/27/2002] The annual Global Guardian exercise tests Stratcom’s ability to fight a nuclear war (see 8:30 a.m. September 11, 2001). [Omaha World-Herald, 2/27/2002; GlobalSecurity (.org), 4/27/2005]
1:05 p.m. September 11, 2001: Report of Airplane Approaching President Bush’s Ranch Turns Out to Be False Alarm
While he is at Barksdale Air Force Base in Louisiana, President Bush receives an intelligence report from the US Strategic Command (Stratcom), informing him that a high-speed object is heading for his ranch in Crawford, Texas. It is already more than 45 minutes since US airspace had been cleared of all aircraft except military and emergency flights (see 12:16 p.m. September 11, 2001). Bush orders an underling to notify everyone at the ranch about this. [New Yorker, 9/25/2001; Sammon, 2002, pp. 117; CBS News, 9/2/2003] In the White House Situation Room, they are also informed of the rogue aircraft. Logan Walters, who is Bush’s personal aide, calls the ranch’s caretaker and tells him, “Get as far away from there as you can.” Senior national security official Franklin Miller then receives a phone call informing him that a combat air patrol (CAP) has been established over the ranch. [Draper, 2007, pp. 142] (A CAP is an aircraft patrol with the purpose of intercepting and destroying hostile aircraft before they reach their targets. [US Department of Defense, 4/12/2001] ) Miller heads to the Presidential Emergency Operations Center (PEOC) below the White House to ask Deputy National Security Adviser Stephen Hadley about the CAP. Both men agree that it seems unnecessarily excessive. When Miller returns to the Situation Room, he sets about calling off the CAP, but finds that it wasn’t even established to begin with, and that, furthermore, the report of a rogue aircraft was a false alarm. [Draper, 2007, pp. 143] A threat to Air Force One had allegedly been received earlier on (see (10:32 a.m.) September 11, 2001), but this too is later deemed to have been a false alarm. [9/11 Commission, 7/24/2004, pp. 554]
3:00 p.m.-3:10 p.m. September 11, 2001: President Bush Is Taken to the Underground Command Center at Offutt Air Force Base
President Bush gets off Air Force One and is taken to a command center several stories underground at Offutt Air Force Base in Nebraska. [Salon, 9/12/2001; Bamford, 2004, pp. 89] At 2:50 p.m., the president’s plane landed at Offutt, home of the US Strategic Command (Stratcom), which controls America’s nuclear weapons (see 2:50 p.m. September 11, 2001). [Associated Press, 9/11/2001; 9/11 Commission, 7/24/2004, pp. 326] About 10 minutes later, Bush emerges from the plane. [Salon, 9/12/2001] Admiral Richard Mies, commander in chief of Stratcom, along with a driver and a Secret Service agent, has come in a car to meet Air Force One on the runway. After getting off the plane, Bush gets into the back of the car with Mies. [Sammon, 2002, pp. 121; NET News, 12/27/2011; Politico Magazine, 9/9/2016] His staffers, meanwhile, get onto buses. [Studies in Intelligence, 9/2006 ] The vehicles are driven away from the plane and across the large base. [Sammon, 2002, pp. 121]
Bush Goes to the Underground Command Center – Bush and his staffers are then taken to Stratcom’s underground command center. [CBS News, 9/2/2003] They are taken by Mies through the center’s fire escape in order to reach it. [NET News, 12/27/2011; Omaha World-Herald, 9/9/2016] They are driven to a small, concrete building, resembling a hut, go through a door in it, and then head down a staircase. [White House, 8/12/2002; Fleischer, 2005, pp. 147-148] “We went down and down and down, pretty far underground,” Brian Montgomery, the White House’s director of advance, will later recall. [Politico Magazine, 9/9/2016] “It’s a long way down,” Karl Rove, Bush’s senior adviser, will describe, “and then you emerge and go through a series of hallways and special doors, blast doors… and then you enter into a conference center, which is… several stories underground.” [ABC News, 9/11/2002]
Exercise Means Extra People Are in the Command Center – The command center, according to author James Bamford, is “a cavernous two-story war room with banks of dark wooden desks curved away from a giant projection screen on which [is] displayed the status of military forces around the world.” [Bamford, 2004, pp. 89] Eight giant video screens are loaded with data and numerous military personnel are seated at computer terminals that are hooked into satellites monitoring activities around the world. [Washington Post, 1/27/2002; Omaha World-Herald, 2/27/2002] Stratcom was in the middle of a major training exercise, called Global Guardian, when the attacks began this morning (see 8:30 a.m. September 11, 2001 and Before 9:00 a.m. September 11, 2001) and consequently many more people are in the command center than would normally be there.
Bush Is Briefed on the Attacks – When Bush enters, Rear Admiral Jay Donnelly, the operations officer in the center, announces, “Ladies and gentlemen, the president.” Everyone comes to attention. Bush then tells them to sit down. Mies gives Bush a briefing in the command center. “The president sat down and I briefed him on what each of [the] screens was displaying,” he will recall, adding, “Gave him, as best I could, an update from [Stratcom’s] perspective of what was happening based on what we knew.” [Omaha World-Herald, 9/8/2002; NET News, 12/27/2011] After being briefed, Bush and Andrew Card, his chief of staff, will be taken to a teleconference center. [CBS News, 9/2/2003; Rove, 2010, pp. 261] There, Bush will conduct a meeting of the National Security Council in a secure video teleconference (see (3:15 p.m.) September 11, 2001). [Washington Times, 10/8/2002; 9/11 Commission, 7/24/2004, pp. 326; NET News, 12/27/2011]
December 4, 2001: Stratcom Report Says US Backed Some Forerunners of Al-Qaeda
The United States Strategic Command (Stratcom) produces a document mentioning that the US backed some of al-Qaeda’s forerunners. The document, an after-action report for Stratcom’s Global Guardian exercise in 2001, contains summaries about terrorist groups from around the world. Its section on al-Qaeda states: “The group was originally brought together from elements of various insurgent military groups which have fought continuously in the Middle East since the 1980s. Some of these groups had US backing in the past.” Al-Qaeda was formed in 1988 (see August 11-20, 1988) by Arabs who had fought for the US-sponsored mujaheddin in the Soviet-Afghan war (see 1985-1986 and 1986-1992). [US Strategic Command, 12/4/2011]
