9/11 hijackers Mohamed Atta and Abdulaziz Alomari’s flight from Portland to Boston takes off. [Federal Bureau of Investigation, 10/4/2001] Their plane, Colgan Air Flight 5930, is a 19-seat Beechcraft 1900. [Federal Bureau of Investigation, 2001; 9/11 Commission, 8/26/2004, pp. 3] Fellow passengers Vincent Meisner and Roger Quirion will later say Atta and Alomari board separately, keep quiet, and do not draw attention to themselves. [Chicago Sun-Times, 9/16/2001; Washington Post, 9/16/2001] Quirion, says: “They struck me as business travelers. They were sitting down, talking, seems like they were going over some paperwork.” [CBS News, 10/12/2001]
6:00 a.m. September 11, 2001: Two Hours Before Attacks, Israeli Company Employees Receive Warnings
Two employees of Odigo, Inc., an Israeli company, receive warnings of an imminent attack in New York City about two hours before the first plane hits the WTC. Odigo, one of the world’s largest instant messaging companies, has its headquarters two blocks from the WTC. The Odigo Research and Development offices where the warnings were received are located in Herzliyya, a suburb of Tel Aviv. Israeli security and the FBI were notified immediately after the 9/11 attacks began. The two employees claim not to know who sent the warnings. “Odigo service includes a feature called People Finder that allows users to seek out and contact others based on certain interests or demographics. [Alex] Diamandis [Odigo vice president of sales and marketing] said it was possible that the attack warning was broadcast to other Odigo members, but the company has not received reports of other recipients of the message.” [Ha’aretz, 9/26/2001; Washington Post, 9/27/2001] Odigo claims the warning did not specifically mention the WTC, but the company refuses to divulge what was specified, claiming, “Providing more details would only lead to more conjecture.” [Washington Post, 9/28/2001] However, a later newspaper report claims that the message declared “that some sort of attack was about to take place. The notes ended with an anti-Semitic slur. ‘The messages said something big was going to happen in a certain amount of time, and it did—almost to the minute,’ said Alex Diamandis, vice president of sales for the high-tech company… He said the employees did not know the person who sent the message, but they traced it to a computer address and have given that information to the FBI.” [Washington Post, 10/4/2001] Odigo gave the FBI the Internet address of the message’s sender so the name of the sender could be found. [Deutsche Presse-Agentur (Hamburg), 9/26/2001] Two months later, it is reported that the FBI is still investigating the matter, but there have been no reports since. [Courier Mail, 11/20/2001]
6:20 a.m.-7:27 a.m. September 11, 2001: Flight 175 Hijackers Check In at Airport and Board Plane; None Selected for Additional Security Scrutiny
All five Flight 175 hijackers reportedly check in at Boston’s Logan Airport, pass through a security checkpoint, and board their plane during this period. The five hijackers are Marwan Alshehhi, Fayez Ahmed Banihammad, Hamza Alghamdi, Ahmed Alghamdi, and Mohand Alshehri. [9/11 Commission, 8/26/2004, pp. 89] The FAA has a program in place called CAPPS, which selects passengers for more thorough security screening based on suspicious behavior such as buying a one-way ticket or paying with cash (see (6:20 a.m.-7:48 a.m.) September 11, 2001). Although reports claim that between two and five of the Flight 175 hijackers have one-way tickets, none are selected by CAPPS. [WorldNetDaily, 4/24/2002; US Congress, 9/26/2002; US Congress, 9/26/2002; Washington Post, 1/28/2004; 9/11 Commission, 8/26/2004, pp. 18] Two of them have problems answering security questions at the ticket counter (see (6:20 a.m.-6:53 a.m.) September 11, 2001). At the security checkpoint, all five would pass through a walk-through metal detector, and an X-ray machine would screen their carry-on luggage. But Logan Airport has no video surveillance of its checkpoints (see 1991-2000), so there is no documentary evidence of exactly when they go through, or how they are processed. Jennifer Gore, the young supervisor overseeing the checkpoint, is later unable to recall seeing any of them. The Globe and Mail will explain, “[S]he was trained to look for metal bits in bags and in clothes, not people.” [Globe and Mail, 9/7/2002; 9/11 Commission, 7/24/2004, pp. 2; 9/11 Commission, 8/26/2004, pp. 18]
6:20 a.m.-7:48 a.m. September 11, 2001: Hijackers Arrive at Airports and Board Flights; Computer Screening Program Fails to Stop Them
All the alleged 9/11 hijackers reportedly check in at the airports from where they board Flights 11, 175, 77, and 93. [9/11 Commission, 7/24/2004, pp. 1-4; 9/11 Commission, 8/26/2004, pp. 27, 89, 93] Since 1998, the FAA has required air carriers to implement a program called the Computer Assisted Passenger Prescreening System (CAPPS). This identifies those passengers who might be a security risk, based upon suspicious behavior such as buying one-way tickets or paying with cash. CAPPS also randomly assigns some passengers to receive additional security scrutiny. If a particular passenger has been designated as a “selectee,” this information is transmitted to the airport’s check-in counter, where a code is printed on their boarding pass. At the airport’s security checkpoints, selectees are subjected to additional security measures. [US News and World Report, 4/1/2002; 9/11 Commission, 1/27/2004; US Congress, 3/17/2004; 9/11 Commission, 8/26/2004, pp. 2, 85] Their baggage is to be screened for explosives or held off the plane until they have boarded. Supposedly, the thinking behind this is that someone smuggling a bomb onto a plane won’t get onto that same flight. According to the 9/11 Commission, nine of the 19 hijackers are flagged by the CAPPS system before boarding Flights 11, 175, 77, and 93. [Washington Post, 1/28/2004; 9/11 Commission, 7/24/2004, pp. 84; United States of America v. Zacarias Moussaoui, a/k/a Shaqil, a/k/a Abu Khalid al Sahrawi, Defendant, 3/6/2006] In addition, Mohamed Atta was selected when he checked in at the airport in Portland, for his earlier connecting flight to Boston (see 5:33 a.m.-5:40 a.m. September 11, 2001). All of the hijackers subsequently pass through security checkpoints before boarding their flights. [9/11 Commission, 7/24/2004, pp. 1-4]
6:20 a.m.-6:53 a.m. September 11, 2001: Two Flight 175 Hijackers Check in at United Airlines Ticket Counter; Uncertainty Over Their Identities
Two of the Flight 175 hijackers approach a customer service representative at the United Airlines ticket counter at Boston’s Logan Airport. The two appear unaccustomed to traveling. One tells the representative, Gail Jawahir, that he needs a ticket, though upon examining his documents she finds he already has one. Both men have problems answering standard security questions, which Jawahir has to repeat very slowly until they give the routine, reassuring answers. There is conflicting evidence over their identities. Jawahir will place her encounter with the men at “shortly before 7 a.m.” Shown photos of the alleged hijackers after 9/11, she will indicate that one of the two she encountered resembled Mohand Alshehri, suggesting the two were Alshehri and Fayez Ahmed Banihammad, who checked in at 6:53 a.m. Yet she recalls the two having the same last name and having assigned seats on Row 9 of the plane, suggesting they were Ahmed and Hamza Alghamdi, who checked in at 6:20 a.m. [9/11 Commission, 7/24/2004, pp. 2, 451; 9/11 Commission, 8/26/2004, pp. 17-18, 89]
6:30 a.m. September 11, 2001: NORAD on Alert for Emergency Exercises
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. [Filson, 2003, pp. 41; Arkin, 2005, pp. 545; GlobalSecurity (.org), 4/27/2005] 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.; Arkin, 2005, pp. 545; GlobalSecurity (.org), 4/27/2005] 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, 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).
Early Morning September 11, 2001: Medic Is Studying Medical Emergency Disaster Plan for Plane Crash at Pentagon
Sergeant Matt Rosenberg, an army medic at the Pentagon, is studying “a new medical emergency disaster plan based on the unlikely scenario of an airplane crashing into the place.” [Washington Post, 9/16/2001] The day before, Rosenberg later recalls in an interview with the Office of Medical History, he called the FBI with questions about who would have medical jurisdiction if such an event were to take place. “Believe it or not, the day prior to the incident, I was just on the phone with the FBI, and we were talking ‘so who has command should this happen, who has the medical jurisdiction, who does this, who does that,’ and we talked about it and talked about it, and he helped me out a lot. And then the next day, during the incident, I actually found him. He was out there on the incident that day.” [Marble and Milhiser, 9/2004, pp. 9]
6:30 a.m. September 11, 2001: White House Situation Room Holds Anti-Terrorism Training Exercise
A spontaneous training exercise is held in the White House Situation Room, based on the scenario of a terrorist bombing in Yemen. In recent months, the Situation Room has been extra vigilant due to the increased reporting of a possible terrorist attack on US interests in the Middle East. Presumably influenced by these concerns, Rob Hargis, the senior duty officer in the Situation Room, now holds an impromptu drill. He says to the others in the room: “Okay, there’s been a large bombing in Yemen. Who does what?” Further details of the exercise are unknown. Commenting on it, John Sherman, one of Hargis’s two assistants, will later say: “We were pretty keen on recognizing an event early. But we had no thoughts that morning about an attack on the homeland.”
Situation Room Is the ‘Nerve Center’ of Crisis Management – The Situation Room is a multi-room facility on the ground floor of the White House’s West Wing. It is staffed around the clock by personnel from each military branch, the State Department, and the intelligence agencies. [McClatchy Newspapers, 8/29/2011] Its mission is to provide current intelligence and crisis support to the National Security Council staff, the national security adviser, and the president. Its watch teams provide 24-hour monitoring of international events. [Studies in Intelligence, 1997] Throughout the terrorist attacks later this morning, the White House Situation Room will serve as “the nerve center of presidential crisis management,” according to McClatchy Newspapers. However, its director, Navy Captain Deborah Loewer, is away from the White House on this day, accompanying President Bush on his visit to Florida. [McClatchy Newspapers, 8/29/2011]
6:30 a.m.-12:00 p.m. September 11, 2001: Radar Located in Northeast US Offline for Repair Work
Military radar in Massachusetts, which is used by NORAD’s Northeast Air Defense Sector (NEADS), is out of use this morning in order to undergo maintenance work. [9/11 Commission, 10/27/2003 
; 9/11 Commission, 10/27/2003 ]
Radar Scheduled to Go Down – The J53 radar in North Truro, Massachusetts, is one of a number of radar sites that NEADS receives data from. [United States Space Command, 12/30/1995; Jane’s C4I Systems, 9/1/2005; North American Aerospace Defense Command, 10/23/2006 ] It has a range of 250 miles. According to Technical Sergeant Jeffrey Richmond, the assistant air surveillance technician at NEADS, J53 is scheduled to go down this morning for some major repairs to be carried out. [9/11 Commission, 10/27/2003 ; 9/11 Commission, 10/27/2003 ]
NEADS Personnel Refer to Radar – A member of staff at NEADS apparently refers to the J53 radar being offline shortly after those on the NEADS operations floor learn of the Flight 11 hijacking (see (8:38 a.m.) September 11, 2001) and while they are trying to locate the hijacked aircraft. She mentions that NEADS technicians “still should be able to get it” (presumably referring to the plane’s radar track) “without 53.” [North American Aerospace Defense Command, 9/11/2001] (According to Richmond, the area covered by J53 is overlapped by other radars, “so the need for radar to undergo routine maintenance is accounted for.”) ID technician Shelley Watson will later recall that the NEADS ID desk uses the J53 radar as a point from which it attempts to locate Flight 11. At some time during the morning, Richmond insists that J53 be put back online at some capacity. Whether this happens is unstated. [9/11 Commission, 10/27/2003 ; 9/11 Commission, 10/27/2003 ]
Radar Part of ‘Joint Surveillance System’ – The J53 radar site is part of the Joint Surveillance System (JSS). [Transportation Safety Board of Canada, 9/2/1998; US Department of the Air Force, 11/1/1999 ; 9/11 Commission, 2004] The JSS consists of “long-range radar sites around the perimeter of the US, with data shared by the [Department of Defense], FAA, Customs, and others.” A 2003 Department of Defense report will state that, at the time of the 9/11 attacks, US air defense relies “largely on outward looking ground-based radars, specifically, the Joint Surveillance System.” [US Department of Defense, 7/2003 ] According to General Ralph Eberhart, the commander of NORAD, NORAD has access to the JSS, “which is that system that rings the United States and looks out.” He will say this system “looks for that foreign threat. It looks for someone coming into our airspace that’s not authorized.” [US Congress. Senate, 10/25/2001]
6:31 a.m. September 11, 2001: President Bush Goes Jogging
President Bush goes for a four-mile jog around the golf course at the Colony Beach and Tennis Resort. [Washington Post, 1/27/2002; Washington Times, 10/7/2002; MSNBC, 10/27/2002]
