Some al-Qaeda operatives hold a meeting in northern Spain to finalize plans for the 9/11 attacks. Those allegedly present are listed below. The first two operatives listed are definitely present; it is less certain that the others are there: 
Future 9/11 hijacker Mohamed Atta. [El Mundo (Madrid), 9/30/2001] Ramzi bin al-Shibh, an associate of Atta from Hamburg, arrives in Spain on July 9, and stays until July 16. Spanish authorities are notified of his arrival in the country by German intelligence (see (Around July 9, 2001)). [New York Times, 5/1/2002] Some reports say that 9/11 hijacker Marwan Alshehhi attends, although if he does, he may use a false identity, as US immigration has no records of his departure or return. [El Mundo (Madrid), 9/30/2001; US Department of Justice, 5/20/2002] The Spanish newspaper La Vanguardia will later report that 9/11 hijackers Waleed and Wail Alshehri meet Atta on July 16. [Associated Press, 9/27/2001] However, there will be no mention of them attending the meeting in some other accounts. For example, their attendance will not be mentioned in the relevant section of the 9/11 Commission Report. [9/11 Commission, 7/24/2004, pp. 243-5] Amer el-Azizi. [Wall Street Journal, 4/7/2004; Associated Press, 1/23/2005] El-Azizi, who seems to have made preparations for the meeting, is under surveillance at this time, as Spanish authorities are listening in on his phone calls. [Wall Street Journal, 3/19/2004] Calls possibly related to the meeting’s organization were overheard (see Before July 8, 2001). [Los Angeles Times, 4/14/2004; Los Angeles Times, 4/29/2004] Spanish judge Baltasar Garzon will later indict el-Azizi for helping plan 9/11 and say that he assisted the plotters by arranging accommodation for them and acting as a courier. However, US officials will be less certain of his involvement. [Associated Press, 1/23/2005] His arrest shortly after 9/11 will be frustrated by Spanish intelligence (see October 2001 and Shortly After November 21, 2001) and he will go on to be involved in the 2004 Madrid bombings (see Before March 11, 2004 and 7:37-7:42 a.m., March 11, 2004). Barakat Yarkas, head of an al-Qaeda-linked cell in Spain. [New York Times, 11/20/2001; Los Angeles Times, 1/14/2003] Mohammed Belfatmi. Belfatmi is an associate of Yarkas, and lives near the hotels where Atta and bin al-Shibh stay. He will flee Europe just before 9/11 with Said Bahaji, a member of the al-Qaeda cell in Hamburg (see September 3-5, 2001). [Los Angeles Times, 1/14/2003; BBC Worldwide Monitoring, 12/2/2004] Mamoun Darkazanli and Mohammed Haydar Zammar, associates of Atta’s from Germany. Al Jazeera reporter Tayseer Allouni. Said Bahaji, a member of the al-Qaeda cell in Hamburg. According to Spanish investigators, Bahaji is with Atta the entire time, and they both stay at the Monica Hotel. [Fouda and Fielding, 2003, pp. 137] 9/11 mastermind Khalid Shaikh Mohammed (KSM). In 2002, Al Jazeera journalist Yosri Fouda will allegedly interview bin al-Shibh and KSM together before either of them are arrested (see April, June, or August 2002). Neither bin al-Shibh nor KSM will discuss any details of the meeting with Fouda, including who attended. KSM will neither confirm nor deny he was there. However, in a 2003 book, Fouda will claim that, according to Spanish investigators, the initial attendees are Atta, bin al-Shibh, Bahaji, and a fourth man who might be KSM. They are later joined by Alshehhi and two unnamed others. [Fouda and Fielding, 2003, pp. 137]
However, there is a parallel meeting in Granada, in the south of Spain, at this time, and Yarkas, Darkazanli, Zammar, and Allouni may only be at that meeting, and may not meet Atta and bin al-Shibh in person (see July 6, 2001 and Shortly After). [New York Times, 11/20/2001; Los Angeles Times, 1/14/2003] After being captured, bin al-Shibh will deny meeting anyone other than Atta while in Spain. [9/11 Commission, 7/24/2004, pp. 243-5] However, questions will be raised about the quality of information obtained from detainees due to the methods—including torture—used to extract it (see June 16, 2004). The movements of Atta and his associates in Spain are apparently mirrored by those of FBI agents John O’Neill and Mark Rossini (see July 5-16, 2001).
August 16, 2001: Moussaoui’s Belongings Possess Information Sufficient to Roll Up 9/11 Plot
After Zacarias Moussaoui is arrested, the FBI wishes to search his possessions (see August 16, 2001 and August 23-27, 2001). According to a presentation made by FBI agent Aaron Zebley at Moussaoui’s trial, the belongings are sufficient to potentially connect Moussaoui to eleven of the 9/11 hijackers: Mohamed Atta, Marwan Alshehhi, Ziad Jarrah, Hani Hanjour, Khalid Almihdhar, Nawaf Alhazmi, Fayez Banihammad, Ahmed Alhaznawi, Hamza Alghamdi, Satam Al Suqami, and Waleed Alshehri. The connections would be made, for example, through Ramzi bin al-Shibh, who spoke with Moussaoui on the telephone and wired him money (see July 29, 2001-August 3, 2001), and who was linked to three of the hijacker pilots from their time in Germany together (see November 1, 1998-February 2001). Bin al-Shibh also received money from Mustafa Ahmed al-Hawsawi, who was connected to hijacker Fayez Ahmed Banihammad (see June 25, 2001). [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006] Moussaoui’s notebook contained two recognizable control numbers for the Western Union wire transfers from bin al-Shibh and, according to McClatchy newspapers, a check on these numbers “would probably have uncovered other wires in the preceding days” to bin al-Shibh from al-Hawsawi. [McClatchy Newspapers, 9/11/2007] The discovery of the eleven hijackers could potentially have led to the discovery of some or all of the remaining eight plot members, as they were brothers (Wail and Waleed Alshehri, Nawaf and Salem Alhazmi), opened bank accounts together (see May 1-July 18, 2001 and June 27-August 23, 2001), lived together (see March 2001-September 1, 2001), obtained identity documents together (see April 12-September 7, 2001 and August 1-2, 2001), arrived in the US together (see April 23-June 29, 2001), and booked tickets on the same four flights on 9/11 (see August 25-September 5, 2001).
August 25-September 5, 2001: 9/11 Hijackers Spend Over $30,000 on 9/11 Tickets
All the 9/11 hijackers book their flights for September 11, 2001, using their apparent real names. The total cost of the tickets is in excess of $30,000: August 25: Khalid Almihdhar, who was watchlisted two days previously (see August 23, 2001), and Majed Moqed book tickets for American Airlines flight 77 using the AA.com website. They are collected from the American Airlines ticket counter at Baltimore Washington International Airport on September 5. The tickets were not mailed, because the shipping address did not match the credit card address. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 72, 74 
] August 26: Wail Alshehri buys a ticket for American Airlines flight 11 over the phone with his debit card. His brother Waleed buys a ticket for the same flight at the AA.com website using his debit card. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 72 ] August 27: Nawaf Alhazmi, who was watchlisted four days before (see August 23, 2001), buys tickets for himself and his brother Salem for American Airlines flight 77 through Travelocity from a Kinkos computer in Laurel, Maryland, using his debit card (see August 25-27, 2001). [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 72 ] August 27: Saeed Alghamdi uses his debit card to purchase tickets for United Airlines flight 93 for himself and Ahmed Alnami from the UA.com website. The tickets are not paid for until September 5, 2001, due to a problem with the debit card. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 72 ] August 27: Fayez Ahmed Banihammad uses his visa card to purchase tickets for himself and Mohamed Alshehri for United Airlines flight 175 over the telephone. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 72-73 ; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ] August 28: Mohamed Atta uses his debit card to buy tickets for American Airlines flight 11 for himself and Abdulaziz Alomari from the AA.com website. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ] August 28: Waleed Alshehri purchases a ticket for Satam Al Suqami for American Airlines flight 11 in person from the company’s counter at Fort Lauderdale Airport. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 73 ] August 28: Marwan Alshehhi purchases a ticket for United Airlines flight 175 from the company’s counter at Miami International Airport. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 73 ] August 29: Hamza Alghamdi books tickets for himself and Ahmed Alghamdi for United Airlines flight 175 from the UA.com website. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ] August 29: Ahmed Alhaznawi creates a new e-mail account and Travelocity.com account and uses them to book a ticket for himself on United Airlines flight 93. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 74 ] August 30: Ziad Jarrah purchases a ticket for himself for United Airlines flight 93 from the UA website. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ] August 31: Hani Hanjour purchases a ticket for American Airlines flight 77 from ATS Advanced Travel Services in Totowa, New Jersey, paying in cash. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ]
At least five tickets are one way only. [Los Angeles Times, 9/18/2001] There are numerous connections between the hijackers booked on the four flights by this point: Hijackers on different 9/11 flights arrived in the US on the same plane. For example, Salem Alhazmi (Flight 77) arrived with Abdulaziz Alomari (Flight 11), and Fayez Ahmed Banihammad (Flight 175) arrived with Saeed Alghamdi (Flight 93) (see April 23-June 29, 2001); Two of the pilots, Mohamed Atta and Marwan Alshehhi, train and live together, and have a joint bank account (see (Mid-July 2000 – Early January 2001), July 6-December 19, 2000, and June 28-July 7, 2000); Hijackers from different planes open bank accounts together (see May 1-July 18, 2001 and June 27-August 23, 2001); and The hijackers obtain identity documents together (see April 12-September 7, 2001 and August 1-2, 2001).
Six hijackers also provide the same phone number and three use the same address. [Miami Herald, 9/22/2001]
September 7-11, 2001: Some 9/11 Hijackers Sleep with Prostitutes
In the days before the attacks, some of the hijackers (including Waleed Alshehri and/or Wail Alshehri) apparently sleep with prostitutes in Boston hotel rooms, or at least try to do so. A driver working at an “escort service” used by the hijackers claims he regularly drove prostitutes to a relative of bin Laden about once a week until 9/11, when the relative disappeared. Bin Laden has several relatives in the Boston area, most or all of whom returned to Saudi Arabia right after 9/11. [Boston Herald, 10/10/2001] On September 7, two female escorts are sent to “Arab men” in the Park Inn, Boston. One of the escorts will later say that a photo of Satam Al Suqami looks “very familiar.” [Federal Bureau of Investigation, 10/2001, pp. 264 ] On September 10, four other hijackers in Boston (Marwan Alshehhi, Fayez Ahmed Banihammad, Mohand Alshehri, and Satam Al Suqami) call around to find prostitutes to sleep with on their last night alive, but in the end decline. Says one official, “It was going to be really expensive and they couldn’t come to a consensus on price, so that was the end of it… Either they thought it was too extravagant [over $400] or they did not have enough money left.” [Boston Globe, 10/10/2001]
Before September 11, 2001: 9/11 Hijackers Drink Alcohol and Watch Strip Shows, Especially towards Eve of Attacks
A number of the 9/11 hijackers apparently drink alcohol heavily in bars, sleep with prostitutes, and watch strip shows in the US in the months and especially the days leading up to 9/11. In late February 2001, hijacker Ziad Jarrah frequents a strip club in Jacksonville, Florida (see February 25-March 4, 2001). In July 2001, hijackers Hamza Alghamdi and Marwan Alshehhi make two purchases of “pornographic video and sex toys” from a Florida store (see July 4-27, 2001). Some hijackers, including possibly Satam Al Suqami and Waleed and Wail Alshehri, sleep with prostitutes in the days before 9/11 (see September 7-11, 2001). On September 10, three hijacker associates spend $200 to $300 apiece on lap dances and drinks in the Pink Pony, a Daytona Beach, Florida, strip club. While the hijackers have left Florida by this time, Mohamed Atta is reported to have visited the same strip club, and these men appear to have foreknowledge of the 9/11 attacks (see September 10, 2001). [Boston Herald, 10/10/2001] Alshehhi and Atta are seen entering the Hollywood, Florida, sports bar Shuckums already drunk. They proceed to drink even more hard alcohol there (see September 7, 2001). Atta and Alshehhi are seen at Sunrise 251, a bar in Palm Beach, Florida. They spend $1,000 in 45 minutes on Krug and Perrier-Jouet champagne. Atta is with a tall busty brunette in her late twenties; Alshehhi is with a shortish blonde. Both women are known locally as regular companions of high-rollers. [Daily Mail, 9/16/2001] A stripper at the Olympic Garden Topless Cabaret in Las Vegas, Nevada, will later recall Alshehhi being “cheap,” paying only $20 for a lap dance. [Cox News Service, 10/16/2001] Several hijackers reportedly patronize the Nardone’s Go-Go Bar in Elizabeth, New Jersey. They are even seen there on the weekend before 9/11. [Boston Herald, 10/10/2001; Wall Street Journal, 10/16/2001] Majed Moqed visits a porn shop on three occasions and rents a porn video. The mayor of Paterson, New Jersey, will later say of the six hijackers who stay there, “Nobody ever saw them at mosques, but they liked the go-go clubs.” [Newsday, 9/23/2001; Newsweek, 10/15/2001] Nawaf Alhazmi and Khalid Almihdhar often frequent Cheetah’s, a nude bar in San Diego. [Los Angeles Times, 9/1/2002] Alshehhi is possibly seen in the Cheetah nightclub in Pompado Beach, Florida, on July 1, 2001. Six dancers who work there will later claim to have seen him. [Federal Bureau of Investigation, 10/2001, pp. 173 ] Hamza Alghamdi watches a porn video on either the afternoon of September 9 or on September 10. [Federal Bureau of Investigation, 10/2001, pp. 272 ; Wall Street Journal, 10/16/2001]
Temple University, Philadelphia, professor Mahmoud Mustafa Ayoub will later comment: “It is incomprehensible that a person could drink and go to a strip bar one night, then kill themselves the next day in the name of Islam.… People who would kill themselves for their faith would come from very strict Islamic ideology. Something here does not add up.” [South Florida Sun-Sentinel, 9/16/2001]
6:45 a.m. September 11, 2001: 9/11 Hijackers Cause Trouble at Logan Airport; Have Flight Training Manuals in Car
Flight 11 hijackers Waleed Alshehri, Wail Alshehri, and Satam Al Suqami arrive at Boston’s Logan Airport in a rental car, which they park in the airport’s central parking lot. [9/11 Commission, 8/26/2004, pp. 5] An unidentified man who arrives at Logan Airport at “about 6:30 a.m.” for an early flight has an argument with several Middle Eastern men over a parking space, before moving on, according to the News of the World. Some early press reports will say his confrontation is with five men. [Boston Herald, 9/12/2001; Daily Telegraph, 9/13/2001; ABC News, 9/14/2001; News of the World, 9/16/2001] However, the 9/11 Commission will later describe the incident differently. It will say there are just three Middle Eastern men, and the man ends up parked next to them. One of the Middle Eastern men opens his car door to get out and then spends time “fiddling with his things,” thus trapping the man in his car. Eventually the man has to force his way out, but the Middle Eastern men are completely unresponsive to him, saying nothing. The man will report the incident to authorities after hearing of the attacks. However, whether he identifies the men as Flight 11 hijackers is unstated. The hijackers’ car, which is associated with either Wail or Waleed Alshehri, will be found in the lot later in the day of 9/11. [9/11 Commission, 8/26/2004, pp. 85] Authorities will find Arabic-language flight training manuals inside the Mitsubishi rental. [Associated Press, 9/12/2001; Boston Herald, 9/12/2001; Daily Telegraph, 9/13/2001]
6:45 a.m.-7:40 a.m. September 11, 2001: Three Flight 11 Hijackers Selected for Additional Screening When They Pass through Airport Security
During this period, all five Flight 11 hijackers check in at Boston’s Logan Airport and board their plane, bound for Los Angeles. The FAA has a program in place called the Computer Assisted Passenger Prescreening System (CAPPS), which is designed to identify those passengers most likely requiring additional scrutiny by airport security (see (6:20 a.m.-7:48 a.m.) September 11, 2001). Ticket records will show that CAPPS selects three of the Flight 11 hijackers at Logan: Since Waleed Alshehri checks no bags his selection has no consequences; Wail Alshehri and Satam Al Suqami have their bags scanned for explosives, but are not stopped. All five hijackers would need to pass through a security checkpoint to reach the departure gate for their flight. Each would have been screened as they walked through a metal detector calibrated to detect items with at least the metal content of a small-caliber handgun. If they’d set this off, they would have been screened with a handheld metal detector. An X-ray machine would have screened their carry-on luggage. However, Logan Airport has no video surveillance of its security checkpoints (see 1991-2000), so there is no documentary evidence of exactly when they pass through them, or if alarms are triggered. According to the 9/11 Commission, none of the checkpoint supervisors later recall seeing any of the Flights 11 hijackers, or report anything suspicious having occurred. [9/11 Commission, 1/27/2004; 9/11 Commission, 7/24/2004, pp. 1-2; 9/11 Commission, 8/26/2004, pp. 5-6] However, a WorldNetDaily article will claim that some Logan staff members recall seeing Mohamed Atta (see (6:50 a.m.-7:40 a.m.) September 11, 2001). [WorldNetDaily, 9/21/2001] The Boston Globe will later comment, “aviation specialists have said it is unlikely that more rigorous attention to existing rules would have thwarted the 10 hijackers who boarded two jets at Logan on Sept. 11. At the time, the knives and box-cutters they were carrying were permitted.” [Boston Globe, 10/17/2001]
7:00 a.m.-7:45 a.m. September 11, 2001: Computer Screening Program Selects Some 9/11 Hijackers; Fails to Stop Them
Sometime during this period, the 9/11 hijackers pass through airport security checkpoints at the various airports. The FAA has a screening program in place called the Computer Assisted Passenger Prescreening System (CAPPS). CAPPS automatically targets passengers for additional screening based on suspicious behavior such as buying one-way tickets or paying with cash. If a passenger is selected, their bags are thoroughly screened for explosives, but their bodies are not searched. [Washington Post, 1/28/2004] CAPPS selects three of the five Flight 11 hijackers. Since Waleed Alshehri checked no bags, his selection had no consequences. Wail Alshehri and Satam Al Suqami have their bags scanned for explosives, but are not stopped. No Flight 175 hijackers are selected. Only Ahmed Alhaznawi is selected from Flight 93. His bag is screened for explosives, but he is not stopped. The 9/11 Commission later concludes that Alhaznawi and Ahmed Alnami, also headed to Flight 93, have suspicious indicators and that they could have been linked to al-Qaeda upon inspection, but it has not been explained why or how. [9/11 Commission, 1/27/2004; Baltimore Sun, 1/27/2004] Screening of the Flight 77 hijackers is described below.
8:46 a.m. September 11, 2001: Flight 11 Hits the North Tower of the World Trade Center
Flight 11 slams into the WTC North Tower (Building 1). Hijackers Mohamed Atta Waleed Alshehri, Wail Alshehri, Abdulaziz Alomari, and Satam Al Suqami presumably are killed instantly, and many more in the tower will die over the next few hours. Seismic records pinpoint the crash at 26 seconds after 8:46 a.m. [CNN, 9/12/2001; New York Times, 9/12/2001; North American Aerospace Defense Command, 9/18/2001; USA Today, 12/20/2001; Federal Emergency Management Agency, 5/1/2002, pp. 1-10; New York Times, 5/26/2002; USA Today, 8/12/2002; Associated Press, 8/21/2002; Newsday, 9/10/2002] The NIST report states the crash time to be 8:46:30. [National Institute of Standards and Technology, 9/2005, pp. 19] The 9/11 Commission Report states the crash time to be 8:46:40. [9/11 Commission, 7/24/2004, pp. 7] Investigators believe the plane still has about 10,000 gallons of fuel (see 8:57 a.m. September 11, 2001). [New York Times, 5/26/2002] The plane strikes the 93rd through 99th floors in the 110-story building. No one above the crash line survives; approximately 1,360 people die. Below the crash line, approximately 72 die and more than 4,000 survive. Both towers are slightly less than half full at the time of the attack, with between 5,000 to 7,000 people in each tower. This number is lower than expected. Many office workers have not yet shown up to work, and tourists to the observation deck opening at 9:30 A.M. have yet to arrive. [USA Today, 12/20/2001; National Institute of Standards and Technology, 9/2005, pp. 20-22] The impact severs some columns on the north side of the North Tower. Each tower is designed as a “tube-in-tube” structure and the steel columns which support its weight are arranged around the perimeter and in the core. The plane, which weighs 283,600 lb and is traveling at an estimated speed of around 430 mph (see October 2002-October 2005), severs 35 of the building’s 236 perimeter columns and damages another two. The damage to the South Tower’s perimeter will be similar (see 9:03 a.m. September 11, 2001). [National Institute of Standards and Technology, 9/2005, pp. 5-9, 20, 22] The perimeter columns bear about half of the tower’s weight, so this damage reduces its ability to bear gravity loads by about 7.5 percent. [National Institute of Standards and Technology, 9/2005, pp. 6] The actual damage to the 47 core columns is not known, as there are no photographs or videos of it, but there will be much speculation about this after 9/11. It will be suggested that some parts of the aircraft may have damaged the core even after crashing through the exterior wall. According to the National Institute of Standards and Technology (NIST): “Moving at 500 mph, an engine broke any exterior column it hit. If the engine missed the floor slab, the majority of the engine core remained intact and had enough residual momentum to sever a core column upon direct impact.” [National Institute of Standards and Technology, 9/2005, pp. 107] According to NIST’s base case computer model, three of the core columns are severed and another ten suffer some damage. [National Institute of Standards & Technology, 9/2005, pp. 189 ] If this is accurate, it means that the impact damage to the core reduces the Tower’s strength by another approximately 7.5 percent, meaning that the building loses about 15 percent of its strength in total. This damage will be cited after 9/11 by NIST and others researchers as an event contributing to the building’s collapse (see October 23, 2002 and October 19, 2004). In addition, some of the fireproofing on the steel columns and trusses may be dislodged. The original fireproofing on the fire floors was mostly Blazeshield DC/F, but some of the fireproofing on the flooring has recently been upgraded to Blazeshield II, which is about 20 percent denser and 20 percent more adhesive. [National Institute of Standards & Technology, 9/2005, pp. xxxvi, 83 ] Photographs and videos of the towers will not show the state of fireproofing inside the buildings, but NIST will estimate the damage to it using a computer model. Its severe case model (see (October 2002-October 2005)) will predict that 43 of the 47 core columns are stripped of their fireproofing on one or more floors and that fireproofing is stripped from trusses covering 60,000 ft2 of floor area, the equivalent of about one and a half floors. NIST will say that the loss of fireproofing is a major cause of the collapse (see April 5, 2005), but only performs 15 tests on fireproofing samples (see October 26, 2005). [National Institute of Standards and Technology, 9/2005, pp. 23] According to NIST, more fireproofing is stripped from the South Tower (see 9:03 a.m. September 11, 2001).
Around 10:00 a.m. September 11, 2001: Someone in Hijackers’ Room Tells Housekeeper Not to Enter It, Although Hijackers Have Already Left
When a housekeeper at the Park Inn in Boston, where 9/11 hijackers Wail and Waleed Alshehri stayed before the attacks, attempts to clean their room, a “male of foreign descent” tells her she should not clean it yet and should return in the early afternoon, as someone is still asleep there. The hijackers are thought to have left the hotel and checked in for their flights several hours previously (see (6:20 a.m.-7:48 a.m.) September 11, 2001). The male’s identity is unknown and the housekeeper’s story appears to confuse the FBI, as an entry about it in an FBI timeline drafted after the attacks ends with five question marks. [Federal Bureau of Investigation, 10/2001, pp. 292 ]
