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Context of 'September 19-October 2001: Structural Engineer Finds Evidence of Extreme Temperatures at WTC'

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Fred Sorbi, and the Cessna 172 used by the hijackers. Fred Sorbi, and the Cessna 172 used by the hijackers. [Source: San Diego Channel 10]9/11 hijackers Nawaf Alhazmi and Khalid Almihdhar arrive at Sorbi’s Flying Club, a small school in San Diego, and announce that they want to learn to fly Boeing airliners. Alhazmi had previously had a lesson at another nearby flying school (see April 4, 2000). [Washington Post, 9/30/2001] They are there with someone named “Hani”—possibly 9/11 hijacker Hani Hanjour—but only the two of them go up in an airplane. The 9/11 Commission will say that Hanjour is outside the US at this time, although some media reports will place him in San Diego (see (Early 2000-November 2000)). [South Florida Sun-Sentinel, 9/28/2001] Instructor Rick Garza says that the dream to fly big jets is the goal of practically every student who comes to the school, but he notices an unusual lack of any basic understanding of aircraft in these two. When he asks Almihdhar to draw the aircraft, Almihdhar draws the wings on backwards. Both speak English poorly, but Almihdhar in particular seems impossible to communicate with. Rather than following the instructions he was given, he would vaguely reply, “Very good. Very nice.” [Chicago Tribune, 9/30/2001] The two offer extra money to Garza if he will teach them to fly multi-engine Boeing planes, but Garza declines. [Washington Post, 9/30/2001] “I told them they had to learn a lot of other things first… It was like Dumb and Dumber. I mean, they were clueless. It was clear to me they weren’t going to make it as pilots.” [Observer, 10/7/2001 Sources: Rick Garza]

Entity Tags: Rick Garza, Nawaf Alhazmi, Hani Hanjour, Khalid Almihdhar, Sorbi’s Flying Club

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Ziad Jarrah, with dark blue shirt and sunglasses, leaning against an airplane. He is surrounded by his fellow flight school students.Ziad Jarrah, with dark blue shirt and sunglasses, leaning against an airplane. He is surrounded by his fellow flight school students. [Source: History Channel]9/11 hijacker Ziad Jarrah attends the Florida Flight Training Center (FFTC) in Venice, Florida, where he takes lessons in a Cessna 152. According to the FBI, he finishes his training there in December 2000. [Der Spiegel, 2002, pp. 12; US Congress, 9/26/2002] The school’s owner, Arne Kruithof, later says Jarrah is enrolled there until January 15, 2001. [Longman, 2002, pp. 91] The 9/11 Commission says he studies there until January 31, 2001. [9/11 Commission, 8/21/2004, pp. 12 pdf file] However, these latter two accounts conflict with other reports, according to which Jarrah is elsewhere at the same time (see Late November 2000-January 30, 2001). According to the 9/11 Commission, in early August, just weeks after commencing training, Jarrah gains a single-engine private pilot certificate. [9/11 Commission, 7/24/2004, pp. 224] However, Arne Kruithof says that although Jarrah eventually receives his private pilot license and instrument rating, he does not do so while at FFTC. Kruithof later claims that Jarrah becomes an “average” pilot, saying, “We had to do more to get him ready than others. His flight skills seemed to be a little bit out there.” [Longman, 2002, pp. 91] At the same time as Jarrah is in Venice, Mohamed Atta and Marwan Alshehhi attend Huffman Aviation, which is just up the road from FFTC. [Associated Press, 9/9/2002; 9/11 Commission, 7/24/2004, pp. 224] Yet no reports describe him ever meeting them while they are so near to each other. Ramzi bin al-Shibh, who shared an apartment in Hamburg with Mohamed Atta (see November 1, 1998-February 2001), is supposed to join Jarrah at FFTC, wiring the school a $2,200 deposit in August 2000, but is repeatedly unable to obtain the necessary US visa (see May 17, 2000-May 2001). [US Congress, 9/26/2002; 9/11 Commission, 7/24/2004, pp. 225]

Entity Tags: Florida Flight Training Center, Ziad Jarrah

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Huffman Aviation logo.Huffman Aviation logo. [Source: Huffman Aviation]9/11 hijackers Marwan Alshehhi and Mohamed Atta attend Huffman Aviation, a flight school in Venice, Florida and enroll in its Accelerated Pilot Program, aiming to get commercial pilot licenses. According to the school’s owner Rudi Dekkers, Atta already has a private pilot’s license—though where and how he gained this is unstated—and wants to obtain a commercial license. Alshehhi wants to obtain both licenses. They begin their training in a Cessna 172 with instructor Thierry Leklou. According to the 9/11 Commission, by the end of July both are already taking solo flights. However, in August Leklou complains to Chief Flight Instructor Daniel Pursell that the two are failing to follow instructions and have bad attitudes. Pursell considers expelling them, but, according to Dekkers, after a warning they improve their behavior and continue without further problems. [US Congress, 3/19/2002; 9/11 Commission, 7/24/2004, pp. 224, 227; St. Petersburg Times, 7/25/2004] Yet Pursell later testifies that the school’s instructors breathed “a collective sigh of relief” when the two left Huffman. [Associated Press, 3/23/2006] Furthermore, reportedly, “Atta and al-Shehhi would rent a plane from Huffman and be gone for days at a time, Pursell said. They could fly to 20 airports across the state and never be noticed.” [St. Petersburg Times, 7/25/2004] Mark Mikarts, another of the school’s instructors, says Atta has “big problems with authority,” and doesn’t take instructions well. [Wall Street Journal, 9/17/2001; 9/11 Commission, 8/21/2004, pp. 17 pdf file] Susan Hall, Huffman’s office manager, refers to Atta as “the little terrorist” while he is at the school, because, she later says, “I just didn’t like the aura he gave off.” [Reuters, 3/22/2006] In the middle of their training, in late September, Atta and Alshehhi enroll at another flight school, in nearby Sarasota. However, they are soon asked to leave it, and return to Huffman in October (see Late September-Early October 2000). While Atta and Alshehhi attend Huffman Aviation, another of the alleged hijackers, Ziad Jarrah, is taking lessons at a flight school just down the road from them (see (June 28-December 2000)). Yet no reports describe the three ever meeting up while they are all in Venice. According to official accounts, Atta and Alshehhi complete their schooling at Huffman on December 19, 2000, when they take their commercial pilot license tests. Rudi Dekkers says that after returning to the school to settle their bills, they leave and are never seen there again. [US Congress, 3/19/2002; 9/11 Commission, 8/21/2004, pp. 17 pdf file] Yet Daniel Pursell will later allege that early in 2001 the two are still connected with Huffman, being reported to the school for practicing nighttime landings in one of its planes at another Florida airport (see Between January and February 2001).

Entity Tags: Huffman Aviation, Daniel Pursell, Susan Hall, Mohamed Atta, Thierry Leklou, Marwan Alshehhi

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Hani Hanjour, from a 2000 US visa application.
Hani Hanjour, from a 2000 US visa application. [Source: 9/11 Commission]In January 2001, the Arizona flight school JetTech alerts the FAA about hijacker Hani Hanjour. No one at the school suspects Hanjour of terrorist intent, but they tell the FAA he lacks both the English and flying skills necessary for the commercial pilot’s license he has already obtained. For instance, he had taken classes at the University of Arizona but failed his English classes with a 0.26 grade point average. A JetTech flight school manager “couldn’t believe he had a commercial license of any kind with the skills that he had.” A former employee says, “I’m still to this day amazed that he could have flown into the Pentagon. He could not fly at all.” They also note he is an exceptionally poor student who does not seem to care about passing his courses. [New York Times, 5/4/2002; CBS News, 5/10/2002] An FAA official named John Anthony actually sits next to Hanjour in class and observes his skills. He suggests the use of a translator to help Hanjour pass, but the flight school points out that goes “against the rules that require a pilot to be able to write and speak English fluently before they even get their license.” [Associated Press, 5/10/2002] The FAA verifies that Hanjour’s 1999 pilot’s license is legitimate (see April 15, 1999), but takes no other action. However, his license should have been rejected because it had already expired in late 1999 when he failed to take a manadatory medical test. [Associated Press, 9/15/2001; CBS News, 5/10/2002] An Arizona FAA inspector later says, “There should have been a stop right then and there.” He will claim that federal law would have required Hanjour to be re-examined. [Associated Press, 6/13/2002] In February, Hanjour begins advanced simulator training, “a far more complicated task than he had faced in earning a commercial license.” [New York Times, 6/19/2002] The flight school again alerts the FAA about this and gives a total of five alerts about Hanjour, but no further action on him is taken. The FBI is not told about Hanjour. [CBS News, 5/10/2002] Ironically, in July 2001, Arizona FBI agent Ken Williams will recommend in a memo that the FBI liaison with local flight schools and keep track of suspicious activity by Middle Eastern students (see July 10, 2001).

Entity Tags: Federal Aviation Administration, Federal Bureau of Investigation, John Anthony, Pentagon, Hani Hanjour, JetTech

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The most famous image of Mohamed Atta came from his Florida driver’s license.
The most famous image of Mohamed Atta came from his Florida driver’s license. [Source: 9/11 Commission]At least six 9/11 hijackers get more than one Florida driver’s license. They get the second license simply by filling out change of address forms:
bullet Waleed Alshehri—first license May 4, duplicate May 5;
bullet Marwan Alshehhi—first license, April 12, duplicate in June;
bullet Ziad Jarrah—first license May 2, duplicate July 10;
bullet Ahmed Alhaznawi—first license July 10, duplicate September 7 (see September 7, 2001);
bullet Hamza Alghamdi—first license June 27, two duplicates, the second in August; and
bullet “A sixth man” with a Florida duplicate is not named. [South Florida Sun-Sentinel, 9/28/2001] Additionally, some hijackers obtained licenses from multiple states. For instance, Nawaf Alhazmi had licenses from California, New York, and Florida at the same time, apparently all in the same name. [Newsday, 9/21/2001; South Florida Sun-Sentinel, 9/28/2001; South Florida Sun-Sentinel, 9/28/2001; Daily Oklahoman, 1/20/2002]

Entity Tags: Waleed Alshehri, Hamza Alghamdi, Ziad Jarrah, Ahmed Alhaznawi, Marwan Alshehhi, Nawaf Alhazmi

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

This Ahmed Al-Haznawi picture is a photocopy of his 2001 US visa application.This Ahmed Al-Haznawi picture is a photocopy of his 2001 US visa application. [Source: 9/11 Commission]The 13 hijackers commonly known as the “muscle” allegedly first arrive in the US. The muscle provides the brute force meant to control the hijacked passengers and protect the pilots. [Washington Post, 9/30/2001] Yet, according to the 9/11 Commission, these men “were not physically imposing,” with the majority of them between 5 feet 5 and 5 feet 7 tall, “and slender in build.” [9/11 Commission, 6/16/2004, pp. 8] According to FBI Director Mueller, they all pass through Dubai, United Arab Emirates, and their travel was probably coordinated from abroad by Khalid Almihdhar. [US Congress, 9/26/2002] However, some information contradicts their official arrival dates:
bullet April 23: Waleed Alshehri and Satam Al Suqami arrive in Orlando, Florida. Suqami in fact arrived before February 2001. A man named Waleed Alshehri lived with a man named Ahmed Alghamdi in Virginia and Florida between 1997 and 2000. However, it is not clear whether they were the hijackers or just people with the same name (see 1999). [Daily Telegraph, 9/20/2001] Alshehri appears quite Americanized in the summer of 2001, frequently talking with an apartment mate about football and baseball, even identifying himself a fan of the Florida Marlins baseball team. [Associated Press, 9/21/2001]
bullet May 2: Majed Moqed and Ahmed Alghamdi arrive in Washington. Both actually arrived by mid-March 2001. A man named Ahmed Alghamdi lived with a man named Waleed Alshehri in Florida and Virginia between 1997 and 2000. However, it is not clear whether they were the hijackers or just people with the same name (see 1999). [Daily Telegraph, 9/20/2001] Alghamdi apparently praises Osama bin Laden to Customs officials while entering the country and Moqed uses an alias (see May 2, 2001).
bullet May 28: Mohand Alshehri, Hamza Alghamdi, and Ahmed Alnami allegedly arrive in Miami, Florida. Alnami may have a suspicious indicator of terrorist affiliation in his passport (see April 21, 2001), but this is apparently not noticed by US authorities. The precise state of US knowledge about the indicator at this time is not known (see Around February 1993). The CIA will learn of it no later than 2003, but will still not inform immigration officials then (see February 14, 2003). According to other reports, however, both Mohand Alshehri and Hamza Alghamdi may have arrived by January 2001 (see January or July 28, 2001).
bullet June 8: Ahmed Alhaznawi and Wail Alshehri arrive in Miami, Florida. Alhaznawi may have a suspicious indicator of terrorist affiliation in his passport (see Before November 12, 2000), but this is apparently not noticed by US authorities.
bullet June 27: Fayez Banihammad and Saeed Alghamdi arrive in Orlando, Florida.
bullet June 29: Salem Alhazmi and Abdulaziz Alomari allegedly arrive in New York. According to other reports, however, Alhazmi arrived before February 2001. Alhazmi has a suspicious indicator of terrorist affiliation in his passport (see June 16, 2001), but this is apparently not noticed by US authorities.
After entering the US (or, perhaps, reentering), the hijackers arriving at Miami and Orlando airports settle in the Fort Lauderdale, Florida, area along with Mohamed Atta, Marwan Alshehhi, and Ziad Jarrah. The hijackers, arriving in New York and Virginia, settle in the Paterson, New Jersey, area along with Nawaf Alhazmi and Hani Hanjour. [US Congress, 9/26/2002] Note the FBI’s early conclusion that 11 of these muscle men “did not know they were on a suicide mission.” [Observer, 10/14/2001] CIA Director Tenet’s later claim that they “probably were told little more than that they were headed for a suicide mission inside the United States” [US Congress, 6/18/2002] and reports that they did not know the exact details of the 9/11 plot until shortly before the attack [CBS News, 10/9/2002] are contradicted by video confessions made by all of them in March 2001 (see (December 2000-March 2001)).

Entity Tags: Marwan Alshehhi, Mohand Alshehri, Majed Moqed, Mohamed Atta, Ziad Jarrah, Saeed Alghamdi, Khalid Almihdhar, Waleed Alshehri, Wail Alshehri, Satam Al Suqami, Nawaf Alhazmi, Hani Hanjour, Salem Alhazmi, George J. Tenet, Hamza Alghamdi, Abdulaziz Alomari, Ahmed Alhaznawi, Ahmed Alghamdi, Fayez Ahmed Banihammad, Federal Bureau of Investigation, Ahmed Alnami

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Several of the 9/11 hijackers make trips to Las Vegas and the west coast over the summer:
bullet May 24-27: Marwan Alshehhi flies to Vegas (see May 24-27, 2001);
bullet June 7-10: Ziad Jarrah takes a trip to Vegas (see June 7-10, 2001);
bullet June 28-July 1: Mohamed Atta takes his first trip to Vegas, flying from Fort Lauderdale to Boston and then, the next day, to Las Vegas via San Francisco with United Airlines. He stays there three nights, then returns to Boston via Denver, and flies to New York the next day;
bullet July 31-August 1: Waleed Alshehri flies from Fort Lauderdale to Boston and then takes American Airlines flight 195 to San Francisco the next day. After spending a night at the La Quinta Inn, he returns to Miami via Las Vegas; [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 1-2, 16, 18 pdf file; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 55-7 pdf file]
bullet August 1: Actor James Woods sees four people he will later suspect are hijackers, including individuals he believes to be Khalid Almihdhar and Hamza Alghamdi, on a transcontinental flight (see August 1, 2001). Abdulaziz Alomari is reported to try to get into the cockpit on a different flight from Vegas on the same day (see August 1, 2001);
bullet August 13-14: Atta, Hani Hanjour, and Nawaf Alhazmi all fly to Vegas, possibly meeting some other hijackers there (see August 13-14, 2001).
Nawaf Alhazmi and Khalid Almihdhar also made frequent car trips to Las Vegas from San Diego, where they lived in 2000. [Los Angeles Times, 9/1/2002; McDermott, 2005, pp. 192] The reason for these trips is never definitively determined, although there will be speculation the hijackers are casing aircraft similar to those they will hijack on 9/11. The 9/11 Commission will comment, “Beyond Las Vegas’s reputation for welcoming tourists, we have seen no credible evidence explaining why… the operatives flew to or met in Law Vegas.” [9/11 Commission, 7/24/2004, pp. 242, 248] After 9/11, it will be reported that the hijackers may use these cross-country flights to take pictures of airline cockpits and check out security at boarding gates. During the flights, the hijackers apparently take notes, watch the crews, and even videotape them. There are some reports that two, or perhaps more, of the hijackers sit in “jumpseats” in the pilot’s cabin, a courtesy extended by airlines to other pilots, during the surveillance flights (see Summer 2001) and on the day of 9/11 itself (see November 23, 2001). [Boston Globe, 11/23/2001; Associated Press, 5/29/2002] There are reports that the hijackers drink alcohol, gamble, and frequent strip clubs while they are in Las Vegas. For example, according to a dancer named “Samantha,” Marwan Alshehhi stares up at her blankly while she “undulate[s] her hips inches from his face” and only gives her $20, although he is a “light drinker.” [San Francisco Chronicle, 10/4/2001; Newsweek, 10/15/2001]

Entity Tags: Mohamed Atta, Nawaf Alhazmi, Khalid Almihdhar, Waleed Alshehri

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Mohand Alshehri.Mohand Alshehri. [Source: FBI]Janitor William Rodriguez, who has worked at the World Trade Center for 20 years, believes he sees 9/11 hijacker Mohand Alshehri in one of the towers. Rodriguez is cleaning washrooms on the Trade Center’s concourse level one weekend, when a person he later believes to have been Alshehri approaches him and asks, “[H]ow many public bathrooms are in this area?” Rodriguez says he finds this “very strange.” After 9/11, he will recognize the man from newspaper photos as having been the suspected hijacker. He will say he is “very certain, I’ll give it 90 percent” that the man he’d seen was Alshehri. He will tell the FBI of this encounter, but will never hear back from them. FBI officials later say they have never heard of Rodriguez, but they do not discount his story. [Daily Telegraph, 6/15/2004; MSNBC, 6/15/2004; New York Daily News, 6/15/2004] According to FBI and 9/11 Commission accounts, Alshehri has only recently entered the US, on May 28, 2001 (see April 23-June 29, 2001), though other reports suggest he was in the country several months earlier (see January or July 28, 2001). [US Congress, 9/26/2002; 9/11 Commission, 8/21/2004, pp. 23 pdf file]

Entity Tags: William Rodriguez, Mohand Alshehri

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

All the hijackers based in New Jersey open at least one bank account there:
bullet Hani Hanjour opens an account with the Hudson United Bank on June 27, 2001;
bullet He opens another account with the same bank three days later, when Nawaf Alhazmi also opens one;
bullet Ahmed Alghamdi, Nawaf Alhazmi, and Majed Moqed open accounts with the Dime Savings Bank on July 9, 2001;
bullet Khalid Almihdhar opens an account with the Hudson United Bank on July 18, 2001. He closes it on August 31;
bullet Salem Alhazmi opens an account with the Hudson United Bank on July 21, 2001;
bullet Abdulaziz Alomari opens an account with the Hudson United Bank on July 26, 2001;
bullet Khalid Almihdhar opens an account with the First Union National Bank on August 22, 2001 with a $50 deposit. He changes his contact address on September 5;
bullet Hani Hanjour opens an account with First Union National Bank on August 23, 2001 with a $50 deposit. He then attempts to withdraw $5,000 on September 5 and $4,900 from it on September 7, despite it containing nothing but the original $50. Unable to make the withdrawal, he cashes a $20 check instead. Hanjour closes the account the next day. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 pdf file; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 pdf file; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 pdf file] These hijackers will subsequently fly on three of the planes on 9/11. In its Terrorist Financing monograph the 9/11 Commission will note: “Among other things they used the debit cards to pay for hotel rooms—activity that would have enabled the FBI to locate them, had the FBI been able to get the transaction records fast enough. Moreover, Alhazmi used his debit card on August 27 to buy tickets for himself… and fellow Flight 77 hijacker Salem Alhazmi. If the FBI had found either Almihdhar or Nawaf Alhazmi, it could have found the other. They not only shared a common bank but frequently were together when conducting transactions. After locating Almihdhar and Alhazmi, the FBI could have potentially linked them through financial records to the other Flight 77 hijackers… Nawaf Alhazmi and Flight 77 pilot Hani Hanjour had opened separate savings accounts at the same small New Jersey bank at the same time and both gave the same address. On July 9, 2001, the other Flight 77 muscle hijacker, Majed Moqed, opened an account at another small New Jersey bank at the same time as Nawaf Alhazmi, and used the same address. Given timely access to the relevant records and sufficient time to conduct a follow-up investigation, the FBI could have shown that Hani Hanjour, Majed Moqed, and Salem al Hazmi were connected to potential terrorist operatives Almihdhar and Nawaf Alhazmi.” [9/11 Commission, 8/21/2004, pp. 58-59, 141 pdf file] The hijackers also open several other bank accounts (see June 28-July 7, 2000).

Entity Tags: Hani Hanjour, Ahmed Alghamdi, Khalid Almihdhar, Salem Alhazmi, Nawaf Alhazmi, Abdulaziz Alomari, 9/11 Commission, Majed Moqed

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

James Woods.
James Woods. [Source: Disney Enterprises/ Publicity photo]Actor James Woods, flying first class on an airplane, notices four Arabic-looking men, the only other people in the first class section. He concludes they are Islamic militants intent on hijacking the plane, acting very strangely (for instance, only talking in whispers). [Boston Globe, 11/23/2001] He tells a flight attendant, “I think this plane is going to be hijacked,” adding, “I know how serious it is to say this.” He conveys his worries to the pilots, and they assure him that the cockpit would be locked. [New Yorker, 5/27/2002] The flight staff later notifies the FAA about these suspicious individuals. Though the government will not discuss this event, it is highly unlikely that any action is taken regarding the flight staff’s worries [New Yorker, 5/27/2002] Woods will not be interviewed by the FBI until after 9/11. Woods will say the FBI believes that all four men took part in the 9/11 attacks, and the flight he was on was a practice flight for them. [O'Reilly Factor, 2/14/2002] Woods believes one was Khalid Almihdhar and another was Hamza Alghamdi. [New Yorker, 5/27/2002] The FBI later will report that this may have been one of a dozen test run flights starting as early as January (see May 24-August 14, 2001). Flight attendants and passengers on other flights later recall men looking like the hijackers who took pictures of the cockpit aboard flights and/or took notes. [Associated Press, 5/29/2002] The FBI has not been able to find any evidence of hijackers on the flight manifest for Woods’ flight. [New Yorker, 5/27/2002]

Entity Tags: James Woods, Federal Aviation Administration, Federal Bureau of Investigation, Hamza Alghamdi, Khalid Almihdhar

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

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:
bullet 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 pdf file]
bullet 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 pdf file; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 72 pdf file]
bullet 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 pdf file; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 72 pdf file]
bullet 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 pdf file]
bullet 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 pdf file; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 pdf file]
bullet 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 pdf file]
bullet 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 pdf file]
bullet 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 pdf file; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 73 pdf file]
bullet 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 pdf file]
bullet 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 pdf file; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 74 pdf file]
bullet 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 pdf file]
bullet 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 pdf file]
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:
bullet 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);
bullet 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);
bullet Hijackers from different planes open bank accounts together (see May 1-July 18, 2001 and June 27-August 23, 2001); and
bullet 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]

Entity Tags: Ahmed Alnami, Fayez Ahmed Banihammad, Hamza Alghamdi, Khalid Almihdhar, Ahmed Alhaznawi, Hani Hanjour, Marwan Alshehhi, Majed Moqed, Ahmed Alghamdi, Wail Alshehri, Mohamed Atta, Ziad Jarrah, Waleed Alshehri, Abdulaziz Alomari, Satam Al Suqami, Nawaf Alhazmi, Salem Alhazmi, Mohand Alshehri, Saeed Alghamdi

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The jet fuel that spilled from Flight 11 when it hit the North Tower (see 8:46 a.m. September 11, 2001) has mostly burned up by this time. The National Institute of Standards and Technology (NIST), which investigates the collapses, will say “The initial jet fuel fires themselves lasted at most a few minutes.” [National Institute of Standards and Technology, 9/2005, pp. 183] Engineering professor Forman Williams will say the jet fuel “burned for maybe 10 minutes.” [Popular Mechanics, 3/2005] Flight 11, a Boeing 767, had a fuel capacity of 23,980 gallons, but was only carrying about 10,000 gallons when it hit the WTC. NIST will estimate that less than 1,500 gallons were consumed in a fireball inside the tower and a comparable amount was consumed in the fireballs outside the building. Therefore, approximately 7,000 gallons splashed onto the office furnishings and started fires on various floors. However, after the jet fuel is used up, office fires burn until the building collapses. NIST will calculate that there were about four pounds per square foot of combustibles in the office space, or about 60 tons per floor. Offices in the WTC actually have fewer combustibles than some other similar spaces due to the small number of interior walls and limited bookshelf space. NIST will later find that only three of sixteen perimeter columns it recovers reached a temperature of 250°C and neither of the two core columns it retrieves reached this temperature. NIST will also find that none of the samples it acquires reaches a temperature above 600°C (see August 27, 2003). Although steel does not melt until its temperature is about 1,600°C, it may begin to lose significant strength at over 500°C. [National Institute of Standards and Technology, 9/2005, pp. 20, 29, 24, 77] The jet fuel will also burn up in the South Tower about 10 minutes after it is hit (see 9:13 a.m. September 11, 2001).

Entity Tags: Forman Williams, World Trade Center, National Institute of Standards and Technology

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Molten metal pouring out of the side of the World Trade Center.Molten metal pouring out of the side of the World Trade Center. [Source: Cameraplanet]Video footage later reveals that in the minutes immediately before the collapse of the WTC’s South Tower, a stream of molten metal starts pouring out of a window opening around the northeast corner of its 80th floor. FEMA later suggests that this is “possibly aluminum from the airliner,” and comments, “This is of particular interest because, although the building collapse appears to have initiated at this floor level, the initiation seems to have occurred at the southeast rather than the northeast corner.” [Civil Engineering, 5/2002; Federal Emergency Management Agency, 5/1/2002, pp. 2-34; Dwyer and Flynn, 2005, pp. 207] According to the National Institute of Standards and Technology, “The composition of the flowing material can only be the subject of speculation, but its behavior suggests it could have been molten aluminum.” [Pitts, Butler, and Junker, 9/2005, pp. 375] However physics professor Steven E. Jones will in 2006 dispute this, saying that molten aluminum is silvery and never turns yellow, like what is in the video footage. He will instead claim the presence of this molten metal supports the theory that explosives, specifically thermite, are what caused the Twin Towers to collapse. He says thermite can cause steel to melt and become yellowish. [Deseret Morning News, 4/10/2006]

Entity Tags: World Trade Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Numerous witnesses, including firefighters and other rescue workers, hear explosions at the start of, and during, the collapse of the south WTC tower. Some of them report hearing a single explosion:
bullet Jeff Birnbaum: “There was an explosion and the whole top leaned toward us and started coming down.” [Electrical Wholesaling, 2/1/2002]
bullet Battalion Chief John Sudnik: “[W]e heard a loud explosion or what sounded like a loud explosion and looked up and I saw Tower Two start coming down.” [City of New York, 11/7/2001]
bullet Firefighter Edward Kennedy hears “a tremendous boom, explosion… and the top of the building was coming down at us.” [City of New York, 1/17/2002]
bullet Firefighter Edward Sheehey hears “an explosion, looked up, and the building started to collapse.” [City of New York, 12/4/2001]
bullet Battalion Chief Thomas Vallebuona: “I heard ‘boom,’ an exploding sound, a real loud bang. I looked up, and I could see the Trade Center starting to come down.” [City of New York, 1/2/2002]
bullet EMT Julio Marrero: “I heard a loud bang. We looked up, and we just saw the building starting to collapse.” [City of New York, 10/25/2001]
Other witnesses report hearing multiple explosions:
bullet Journalist Pete Hamill: “We heard snapping sounds, pops, little explosions, and then the walls bulged out, and we heard a sound like an avalanche.” [New York Daily News, 9/11/2001]
bullet Police officer Sue Keane, who is an Army veteran, is located in the north WTC tower: “[I]t sounded like bombs going off. That’s when the explosions happened.… It started to get dark, then all of a sudden there was this massive explosion.” [Hagen and Carouba, 2002, pp. 65]
bullet Firefighter Keith Murphy, who is in the lobby of the North Tower: “[T]he first thing that happened, which I still think is strange to me, the lights went out.… I had heard right before the lights went out, I had heard a distant boom boom boom, sounded like three explosions.… At the time, I would have said they sounded like bombs, but it was boom boom boom and then the lights all go out.… I would say about 3, 4 seconds, all of a sudden this tremendous roar.” [City of New York, 12/5/2001]
bullet Firefighter Craig Carlsen hears “explosions coming from building two, the South Tower. It seemed like it took forever, but there were about ten explosions.… We then realized the building started to come down.” [City of New York, 1/25/2002]
bullet Firefighter Thomas Turilli, who is in the lobby of the North Tower: “[A]ll of a sudden you just heard like it almost actually that day sounded like bombs going off, like boom, boom, boom, like seven or eight, and then just a huge wind gust just came… It just seemed like a huge explosion.” [City of New York, 1/17/2002]
bullet Firefighter Stephen Viola: “[T]hat’s when the South Tower collapsed, and it sounded like a bunch of explosions. You heard like loud booms.” [City of New York, 1/10/2002]
bullet Firefighter Lance Lizzul: “[W]e heard some bangs. That made us look up, and that’s when the first Trade Center came down.” [City of New York, 12/10/2001]
bullet Paramedic Kevin Darnowski: “I heard three explosions, and then we heard like groaning and grinding, and Tower Two started to come down.” [City of New York, 11/9/2001]
However, the National Institute of Standards and Technology, which conducts a three-year study of the WTC collapses, will subsequently claim it found “no corroborating evidence for alternative hypotheses suggesting that the WTC towers were brought down by controlled demolition using explosives” (see October 26, 2005). [National Institute of Standards and Technology, 9/2005, pp. 146]

Entity Tags: Julio Marrero, Stephen Viola, John Sudnik, Craig Carlsen, Ed Kennedy, Keith Murphy, Kevin Darnowski, Pete Hamill, Edward Sheehey, World Trade Center, Lance Lizzul, Thomas Vallebuona, Sue Keane, Jeff Birnbaum, Thomas Turilli

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Some witnesses to the collapse of the North Tower think it resembles a demolition using explosives:
bullet Fire Captain Dennis Tardio: “I hear an explosion and I look up. It is as if the building is being imploded, from the top floor down, one after another, boom, boom, boom.” [Smith, 2002, pp. 18]
bullet Assistant Fire Commissioner James Drury: “[P]eople in the street and myself included thought that the roar was so loud that the explosive—bombs were going off inside the building.” [City of New York, 10/16/2001]
bullet Firefighter James Curran: “I heard like every floor went chu-chu-chu. Looked back and from the pressure everything was getting blown out of the floors before it actually collapsed.” [City of New York, 12/30/2001]
bullet EMS Captain Karin Deshore: “Somewhere around the middle of the World Trade Center, there was this orange and red flash coming out. Initially it was just one flash. Then this flash just kept popping all the way around the building and that building had started to explode. The popping sound, and with each popping sound it was initially an orange and then a red flash came out of the building and then it would just go all around the building on both sides as far as I could see. These popping sounds and the explosions were getting bigger, going both up and down and then all around the building. I went inside… and I said I think we have another major explosion.” [City of New York, 11/7/2001]
The National Institute of Standards and Technology, in its report on the towers’ collapse, will reject suggestions that the Twin Towers were brought down with explosives (see August 30, 2006). [National Institute of Standards and Technology, 8/30/2006]

Entity Tags: Karin Deshore, James Drury, World Trade Center, Dennis Tardio, James Curran

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

A four-image progression of photos showing World Trade Center Building 7 collapsing down into its footprint.A four-image progression of photos showing World Trade Center Building 7 collapsing down into its footprint. [Source: unknown] (click image to enlarge)Building 7 of the World Trade Center complex, a 47-story tower, collapses. No one is killed. [CNN, 9/12/2001; Washington Post, 9/12/2001; MSNBC, 9/22/2001; Associated Press, 8/21/2002] It collapses in 6.6 seconds, which is just 0.6 of a second longer than it would have taken a free-falling object dropped from its roof to hit the ground. [Deseret Morning News, 11/10/2005] Many questions will arise over the cause of its collapse in the coming months and years. Building 7, which was not hit by an airplane, is the first modern, steel-reinforced high-rise to collapse because of fire. [Chicago Tribune, 11/29/2001; Stanford Report, 12/5/2001; New York Times, 3/2/2002] Some will later suggest that the diesel fuel stored in several tanks on the premises may have contributed to the building’s collapse. The building contained a 6,000-gallon tank between its first and second floors and another four tanks, holding as much as 36,000 gallons, below ground level. There were also three smaller tanks on higher floors. [Chicago Tribune, 11/29/2001; New York Times, 3/2/2002; New York Observer, 3/25/2002; Federal Emergency Management Agency, 5/1/2002, pp. 1-17] However, the cause of the collapse is uncertain. A 2002 government report will conclude: “The specifics of the fires in WTC 7 and how they caused the building to collapse remain unknown at this time. Although the total diesel fuel on the premises contained massive potential energy, the best hypothesis has only a low probability of occurrence.” [Federal Emergency Management Agency, 5/1/2002, pp. 1-17] Some reports indicate that the building may have been deliberately destroyed. Shortly after the collapse, CBS News anchor Dan Rather comments that the collapse is “reminiscent of… when a building was deliberately destroyed by well-placed dynamite to knock it down.” [CBS News, 9/11/2001] And moments after the collapse, MSNBC’s Brian Williams joins David Restuccio, an FDNY lieutenant, by phone to ask him about the collapse. “You guys knew this was coming all day?” asks Williams. Restuccio replies: “We had heard reports that the building was unstable, and that it would eventually need to come down on its own, or it would be taken down. I would imagine it came down on its own.” Restuccio does not explain what he means by “it would be taken down.” [MSNBC, 9/11/2001]

Entity Tags: Dan Rather, World Trade Center, David Restuccio

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

A chunk of hot metal being removed from the North Tower rubble about eight weeks after 9/11.
A chunk of hot metal being removed from the North Tower rubble about eight weeks after 9/11. [Source: Frank Silecchia]In the weeks and months after 9/11, numerous individuals report seeing molten metal in the remains of the World Trade Center:
bullet Ken Holden, who is involved with the organizing of demolition, excavation, and debris removal operations at Ground Zero, will later tell the 9/11 Commission, “Underground, it was still so hot that molten metal dripped down the sides of the wall from [WTC] Building 6.” [9/11 Commission, 4/1/2003]
bullet William Langewiesche, the only journalist to have unrestricted access to Ground Zero during the cleanup operation, will describe, “[I]n the early days, the streams of molten metal that leaked from the hot cores and flowed down broken walls inside the foundation hole.” [Langewiesche, 2002, pp. 32]
bullet Leslie Robertson, one of the structural engineers responsible for the design of the WTC, describes fires still burning and molten steel still running 21 days after the attacks. [SEAU News, 10/2001 pdf file]
bullet Alison Geyh, who heads a team of scientists studying the potential health effects of 9/11, reports: “Fires are still actively burning and the smoke is very intense. In some pockets now being uncovered, they are finding molten steel.” [Johns Hopkins Public Health Magazine, 2001]
bullet Ron Burger, a public health advisor who arrives at Ground Zero on September 12, says that “feeling the heat” and “seeing the molten steel” there reminds him of a volcano. [National Environmental Health Association, 9/2003, pp. 40 pdf file]
bullet Paramedic Lee Turner arrives at the World Trade Center site on September 12 as a member of a federal urban search and rescue squad. While at Ground Zero, he goes “down crumpled stairwells to the subway, five levels below ground.” There, he reportedly sees, “in the darkness a distant, pinkish glow—molten metal dripping from a beam.” [US News and World Report, 9/12/2002]
bullet According to a member of New York Air National Guard’s 109th Air Wing, who is at Ground Zero from September 22 to October 6: “One fireman told us that there was still molten steel at the heart of the towers’ remains. Firemen sprayed water to cool the debris down but the heat remained intense enough at the surface to melt their boots.” [National Guard Magazine, 12/2001]
bullet New York firefighters will recall “heat so intense they encountered rivers of molten steel.” [New York Post, 3/3/2004]
bullet As late as five months after the attacks, in February 2002, firefighter Joe O’Toole sees a steel beam being lifted from deep underground at Ground Zero, which, he says, “was dripping from the molten steel.” [Knight Ridder, 5/29/2002]
Steven E. Jones, a physics professor from Utah, will claim this molten metal is “direct evidence for the use of high-temperature explosives, such as thermite,” used to deliberately bring down the WTC towers. [MSNBC, 11/16/2005] He will say that without explosives, a falling building would have “insufficient directed energy to result in melting of large quantities of metal.” [Deseret Morning News, 11/10/2005] There will be no mention whatsoever of the molten metal in the official reports by FEMA, NIST, or the 9/11 Commission. [Federal Emergency Management Agency, 5/1/2002; 9/11 Commission, 7/24/2004; National Institute of Standards and Technology, 9/2005] But Dr. Frank Gayle, who leads the steel forensics aspects of NIST’s investigation of the WTC collapses, will be quoted as saying: “Your gut reaction would be the jet fuel is what made the fire so very intense, a lot of people figured that’s what melted the steel. Indeed it didn’t, the steel did not melt.” [ABC News 7 (New York), 2/7/2004] As well as the reports of molten metal, data collected by NASA in the days after 9/11 finds dozens of “hot spots” (some over 1,300 degrees) at Ground Zero (see September 16-23, 2001).

Entity Tags: Frank Gayle, Joe O’Toole, Ken Holden, Leslie Robertson, Alison Geyh, Lee Turner, William Langewiesche, Ron Burger, World Trade Center, Steven E. Jones

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Thermal hot spots detected by satellite on September 16, 2001. Red and orange indicate the hottest locations. The World Trade Center Twin Towers footprint is in the lower center and the center of World Trade Center Building 7 is in the upper right.
Thermal hot spots detected by satellite on September 16, 2001. Red and orange indicate the hottest locations. The World Trade Center Twin Towers footprint is in the lower center and the center of World Trade Center Building 7 is in the upper right. [Source: USGS]In response to requests from the Environmental Protection Agency, through the US Geological Survey, NASA flies a plane over the site of the WTC complex, equipped with a remote sensing instrument called AVIRIS. AVIRIS is able to remotely record the near-infrared signature of heat. Analysis of the data it collects indicates temperatures at Ground Zero of above 800 degrees Fahrenheit, with some areas above 1,300 degrees. On September 16, dozens of “hot spots” are seen, but by September 23, only four or five remain. [US Geological Survey, 11/27/2001; US Geological Survey, 10/2002 pdf file] Robert Shaler, the scientist who leads the forensic examination by the New York City medical examiner’s office to identify 9/11 victims, later will state that the “DNA in the bodies” of WTC victims “was in pretty bad shape. These bones were exposed to extreme temperatures.” [US News and World Report, 12/5/2005] Don Carson, a hazardous materials expert, later will say, “There are pieces of steel being pulled out [of the WTC rubble] that are still cherry red. It’s like the charcoal that you put in your grill.… You light it and it stays hot.” [New York Daily News, 11/1/2001] And Dr. Jonathan Barnett, a member of FEMA’s WTC investigation team, will describe steel members in the debris pile that appear to have been partly evaporated in extremely high temperatures. [New York Times, 11/29/2001] Despite the WTC rubble being pumped with an almost constant jet of water, eventually totaling thousands of gallons, almost 12 weeks after 9/11 at least one fire is still burning, making it the longest-burning structural fire in history. [New Scientist, 12/3/2001; CBS News, 12/19/2001] As well as the hot spots, numerous witnesses describe molten metal being found at Ground Zero (see September 12, 2001-February 2002).

Entity Tags: Robert Shaler, Jonathan Barnett, National Aeronautics and Space Administration, Don Carson

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Dr. Abolhassan Astaneh-Asl examines steel from the World Trade Center.Dr. Abolhassan Astaneh-Asl examines steel from the World Trade Center. [Source: University of California, Berkeley]An engineer investigating the remains of the World Trade Center sees melted girders and other evidence that the towers experienced extreme temperatures on 9/11. Dr. Abolhassan Astaneh-Asl is a professor of civil and environmental engineering at the University of California, Berkeley. He specializes in studying structural damage done by earthquakes and terrorist bombings. [Chronicle of Higher Education, 12/7/2001; CBS News, 3/11/2002] He arrives in New York on September 19 to conduct a two-week scientific reconnaissance of the collapsed towers, hoping to gain an understanding of how they had come down. His project is one of eight financed by the National Science Foundation to study the WTC disaster. [New York Times, 10/2/2001; Berkeleyan, 10/3/2001; US Congress. House. Committee on Science, 3/6/2002] He examines numerous pieces of steel taken from Ground Zero. [Chronicle of Higher Education, 12/7/2001] Astaneh-Asl will describe the WTC as “the best-designed building I have ever seen.” [San Francisco Chronicle, 10/22/2001] Yet he notices unusual warping and other damage in its remaining steel:
bullet At a recycling center in New Jersey, he sees 10-ton steel beams from the towers that look “like giant sticks of twisted licorice.” [Chronicle of Higher Education, 12/7/2001] He shows the San Francisco Chronicle a “banana-shaped, rust-colored piece of steel” that has “twisted like toffee during the terrorist attack.” [San Francisco Chronicle, 10/22/2001]
bullet He later recalls, “I saw melting of girders in [the] World Trade Center.” [PBS, 5/10/2007]
bullet He notes that steel has bent at several connection points that had joined the floors of the WTC to the vertical columns. He describes the connections as being smoothly warped, saying, “If you remember the Salvador Dali paintings with the clocks that are kind of melted—it’s kind of like that.” He adds, “That could only happen if you get steel yellow hot or white hot—perhaps around 2,000 degrees.” [Chronicle of Higher Education, 12/7/2001]
bullet Astaneh-Asl says that steel flanges have been reduced “from an inch thick to paper thin.” [Berkeleyan, 10/3/2001]
bullet He finds a foot-long twisted shard of steel that is “like a piece of bread, but it was high-strength steel.” He comments, “I haven’t seen anything like this [before].” [Berkeley Daily Planet, 10/20/2001]
bullet He finds “severely scorched [steel] members from 40 or so floors below the points of impact [by the planes].” He believes this is the result of the planes having destroyed the elevator walls, thereby allowing burning jet fuel to pour down into the building, igniting fires hundreds of feet below the impact floors. [CBS News, 3/12/2002]
bullet He says that, in some places, the fireproofing used to protect the WTC steel has “melted into a glassy residue.” [New York Times, 10/2/2001]
bullet Astaneh-Asl sees a charred I-beam from WTC Building 7, which collapsed late in the afternoon of 9/11. “The beam, so named because its cross-section looks like a capital I, had clearly endured searing temperatures. Parts of the flat top of the I, once five-eighths of an inch thick, had vaporized.” [New York Times, 10/2/2001]
Other individuals will report seeing molten metal in the remains of the World Trade Center in the weeks and months after 9/11 (see September 12, 2001-February 2002), and data collected by NASA reveals dozens of “hot spots” (some over 1,300 degrees Fahrenheit) at Ground Zero (see September 16-23, 2001). But Thomas Eagar—an engineering professor at the Massachusetts Institute of Technology—later comments that the “temperature of the fire at the WTC [on 9/11] was not unusual, and it was most definitely not capable of melting steel.” [Eagar and Musso, 12/2001] Yet Astaneh-Asl will later put forward the “tentative” conclusion, “The collapse of the [Twin Towers] was most likely due to the intense fire initiated by the jet fuel of the planes and continued due to burning of the building contents.” [Astaneh-Asl, 11/30/2003 pdf file] Astaneh-Asl is a member of the team assembled by the American Society of Civil Engineers to investigate the World Trade Center site after 9/11 (see September 12, 2001), though he will resign from this because he disagrees with its decision to keep findings secret until the initial inquiry has been completed. [New York Times, 10/2/2001; Associated Press, 9/6/2002]

Entity Tags: World Trade Center, Thomas Eagar, Abolhassan Astaneh-Asl

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Khaled al-Harbi (right) talking to Osama bin Laden or one of his doubles.Khaled al-Harbi (right) talking to Osama bin Laden or one of his doubles. [Source: US Department of Defense]A conversation between Osama bin Laden, Ayman al-Zawahiri, al-Qaeda spokesman Suliman abu Ghaith, and Khaled al-Harbi, a veteran of al-Qaeda’s jihad in Bosnia, is videotaped. A portion of the taped conversation is later said to be found by the US and will be used as evidence of bin Laden’s involvement in 9/11. [Unknown, 2001; Guardian, 12/13/2001; Kohlmann, 2004, pp. 28-9] According to a translation released by the Pentagon, the man said to be bin Laden says: “[W]e calculated in advance the number of casualties from the enemy, who would be killed based on the position of the tower. We calculated that the floors that would be hit would be three or four floors. I was the most optimistic of them all… (inaudible)… due to my experience in this field, I was thinking that the fire from the gas in the plane would melt the iron structure of the building and collapse the area where the plane hit and all the floors above it only. This is what we had hoped for.” He continues: “We had notification since the previous Thursday that the event would take place that day. We had finished our work that day and had the radio on. It was 5:30 p.m. our time.… Immediately, we heard the news that a plane had hit the World Trade Center. We turned the radio station to the news from Washington.… At the end of the newscast, they reported that a plane just hit the World Trade Center.… After a little while, they announced that another plane had hit the World Trade Center. The brothers who heard the news were overjoyed by it.” [US Department of Defense, 12/13/2001 pdf file] The release of the tape, which is said to be found by US intelligence officers in Jalalabad, will be a major news story, and the tape will be taken by the media as proof of bin Laden’s responsibility for 9/11. President Bush will comment, “For those who see this tape, they’ll realize that not only is he guilty of incredible murder, he has no conscience and no soul, that he represents the worst of civilization.” British Foreign Secretary Jack Straw will add, “By boasting about his involvement in the evil attacks, bin Laden confirms his guilt.” [BBC, 12/14/2001; Fox News, 12/14/2001; CNN, 12/16/2001] However, the tape will later be disputed from three points of view:
bullet The accuracy of the translation will be questioned (see December 20, 2001). For example, the man thought to be bin Laden does not say “we calculated in advance the number of casualties,” but “we calculated the number of casualties”;
bullet An analyst will conclude that the tape was actually made earlier as a part of a US-run sting operation (see (September 26, 2001));
bullet Some commentators will question whether the person in the video is actually bin Laden (see December 13, 2001).
In mid-2002, Al Jazeera reporter Yosri Fouda will allegedly interview al-Qaeda figures Ramzi bin al-Shibh and Khalid Shaikh Mohammed (see April, June, or August 2002). In a 2003 book he will co-write, Fouda will claim that he asked an unnamed al-Qaeda operative who was setting up the interview if the bin Laden video was fake. This person will supposedly reply: “No. The tape, the brothers said—I am not sure whether they left it behind or not—but the Sheikh [bin Laden], yes, was talking to someone from Mecca.” [Fouda and Fielding, 2003, pp. 135]

Entity Tags: Jack Straw, George W. Bush, Khaled al-Harbi, Central Intelligence Agency, Osama bin Laden, Ayman al-Zawahiri, Bush administration (43), Suliman abu Ghaith, Yosri Fouda

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The man in the picture on the left is supposed to be bin Laden in October 2001. The picture on the right is undisputendly bin Laden in DecemberThe man in the picture on the left is supposed to be bin Laden in October 2001. The picture on the right is undisputendly bin Laden in December [Source: Reuters]Following the release of a home video in which Osama bin Laden apparently confesses to involvement in 9/11 (see Mid-November 2001), some commentators question its authenticity, as a number of strange facts about the video soon emerge. For example, all previous videos had been made with the consent of bin Laden, and usually released to the Arabic television channel Al Jazeera. This video was supposedly recorded without his knowledge, found in a house in Afghanistan, and then passed to the CIA by an unknown person or group. Experts point out that it would be possible to fake such a video. So many people doubt the video’s authenticity that President Bush soon makes a statement, saying it was “preposterous for anybody to think this tape was doctored. Those who contend it’s a farce or a fake are hoping for the best about an evil man.” [Guardian, 12/15/2001] Some commentators will suggest that the person thought to be bin Laden is not actually the al-Qaeda leader. For example, arabist Kevin Barrett will say that the person in the video is “at least 40 or 50 pounds heavier, and his facial features [are] obviously different.” [Capital Times (Madison), 2/14/2006] The man said to be bin Laden also makes some questionable statements in the video:
bullet “I was thinking that the fire from the gas in the plane would melt the iron structure of the building…” [US Department of Defense, 12/13/2001 pdf file] The jet fuel spilled from the planes burned up about 10 minutes after impact (see 8:57 a.m. September 11, 2001), the towers’ structure did not melt (see September 12, 2001-February 2002), and the towers were not made of iron, but steel. [National Institute of Standards and Technology, 9/2005, pp. 6] Bin Laden had studied civil engineering at university and had experience as a construction contractor. [Burke, 2004, pp. 47; Laden, 2005, pp. xii-xiii] It is unclear why he would think the towers were made of iron.
bullet “We did not reveal the operation to [the brothers who conducted the operation] until they are there and just before they boarded the planes.” [US Department of Defense, 12/13/2001 pdf file] All the hijackers purchased tickets for the 9/11 flights about two weeks in advance (see August 25-September 5, 2001). The six plot leaders had flight training (see July 6-December 19, 2000, (June 28-December 2000), January-February 2001, and May 5 and 10, 2000), and some of the other 13 are thought to have assisted with target surveillance and casing flights (see May 24-August 14, 2001, August 1, 2001, June 2001 and August 2001).
bullet “Those who were trained to fly didn’t know the others. One group of people did not know the other group.” [US Department of Defense, 12/13/2001 pdf file] The opposite is true: the pilots intermingled with the muscle and the teams for the various planes mixed (see April 23-June 29, 2001, April 12-September 7, 2001, and June 27-August 23, 2001).
There are reports that bin Laden had from four to ten look-alike doubles at the time. [Agence France-Presse, 10/7/2001; London Times, 11/19/2001]

Entity Tags: Bush administration (43), Kevin Barrett, Central Intelligence Agency, George W. Bush, Osama bin Laden

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

A structural engineer who was a member of the team assembled by the American Society of Civil Engineers to investigate the World Trade Center site after 9/11 complains about the decision to rapidly destroy the remaining structural steel from the collapsed WTC buildings. Dr. Abolhassan Astaneh-Asl is a professor of civil and environmental engineering at the University of California at Berkeley, and specializes in studying structural damage done by earthquakes and terrorist bombings. [Chronicle of Higher Education, 12/7/2001; CBS News, 3/11/2002; Associated Press, 9/6/2002] He had come to New York a week after 9/11 to examine the collapsed towers, hoping to gain an understanding of how they had come down (see September 19-October 2001). [New York Times, 10/2/2001; US Congress. House. Committee on Science, 3/6/2002] However, New York City officials had decided early on to quickly transport the remaining structural steel to scrap yards, to be shipped abroad and melted down for reuse (see Shortly After September 11, 2001). As CBS News now reports, “As a result, Astaneh has almost certainly missed seeing crucial pieces before they were cut up and sent overseas.” Astaneh-Asl complains: “When there is a car accident and two people are killed, you keep the car until the trial is over. If a plane crashes, not only do you keep the plane, but you assemble all the pieces, take it to a hangar, and put it together. That’s only for 200, 300 people, when they die. In this case you had 3,000 people dead.” He says: “My wish was that we had spent whatever it takes, maybe $50 million, $100 million, and maybe two years, get all this steel, carry it to a lot. Instead of recycling it, put it horizontally, and assemble it. You have maybe 200 engineers, not just myself running around trying to figure out what’s going on. After all, this is a crime scene and you have to figure out exactly what happened for this crime, and learn from it.” However, he adds, “My wish is not what happens.” [CBS News, 3/12/2002] Astaneh-Asl previously told the New York Times that the scrap steel from the WTC was “worth only a few million dollars, a tiny fraction of the billions of dollars the cleanup will cost.” Yet the knowledge that could be gained from it “could save lives in a future disaster.” [New York Times, 10/2/2001]

Entity Tags: World Trade Center, Abolhassan Astaneh-Asl

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The National Institute of Standards and Technology (NIST)—an agency of the US Commerce Department’s Technology Administration—announces details of its forthcoming investigation into the collapses of the World Trade Center Twin Towers and Building 7 on 9/11. The NIST investigation aims “to investigate the building construction, the materials used, and the technical conditions that contributed to the outcome of the World Trade Center (WTC) disaster.” It also aims to examine the activities of building occupants and emergency responders on 9/11, studying such issues as emergency communications within the WTC, the movement of people during the evacuations, and issues around persons with disabilities. Leading technical experts from industry, academia, and other laboratories, alongside NIST’s own expert staff, will participate in the investigation. Expert professionals from the private sector will also be involved. Glenn Corbett, a fire science professor at John Jay College, says, “This is going to be the most extensive building disaster investigation ever performed.” [Associated Press, 8/21/2002; National Institute of Standards and Technology, 8/21/2002; National Institute of Standards and Technology, 8/3/2005] The investigation is formally authorized in October 2002, when the National Construction Safety Team Act is signed into law. The act, which gives NIST authorization to investigate major building failures in the US, is written largely as a result of the World Trade Center collapses. [National Institute of Standards and Technology, 10/2/2002; New York Times, 5/8/2003] NIST’s investigation is originally proposed to last two years, with a budget of $16 million. [National Institute of Standards and Technology, 8/21/2002] However, it eventually will last three years, with its final report into the collapses of the Twin Towers being released in October 2005 (see October 26, 2005). A previous analysis of the WTC collapses conducted by FEMA and the American Society of Civil Engineers (ASCE) was completed earlier in 2002 (see May 1, 2002), but this had a budget of just $1.1 million. By the time NIST starts its investigation, much of the crucial steel debris from the WTC collapses has already been destroyed (see September 12-October 2001). They later refer to there being a “scarcity of physical evidence that is typically available in place for reconstruction of a disaster.” [National Institute of Standards and Technology, 9/2005, pp. xxxvi]

Entity Tags: World Trade Center, National Institute of Standards and Technology, Glenn Corbett

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

During the course of its three-year investigation of the World Trade Center collapses, the National Institute of Standards and Technology (NIST) performs computer simulations of the behavior of each WTC tower on 9/11. In its final report, released in October 2005 (see October 26, 2005), it will describe having determined which variables most affected the outcome of its various simulations. Then, “[f]or each of the most influential variables, a central or middle value and reasonable high and low values were identified.” However, “[u]pon a preliminary examination of the middle cases, it became clear that the towers would likely remain standing. The less severe cases were discarded after the aircraft impact results were compared to observed events. The middle cases… were discarded after the structural response analysis of major subsystems were compared to observed events.” Therefore, the “more severe case… was used for the global analysis of each tower.” But, to “the extent that the simulations deviated from the photographic evidence or eyewitness reports, the investigators adjusted the input, but only within the range of physical reality.” [National Institute of Standards and Technology, 9/2005, pp. 143-144]

Entity Tags: National Institute of Standards and Technology, World Trade Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The National Institute of Standards and Technology (NIST) issues a progress report on its investigation into the World Trade Center collapses. Since 2002, NIST has been investigating the collapses of the Twin Towers and WTC Building 7 (see August 21, 2002). The progress report includes its “working hypothesis” for the collapse of WTC 7. This was a 47-story building, located about 350 feet from the north side of WTC 1, which collapsed completely at around 5:20 in the afternoon of 9/11. The report claims that “fire appears to have played a key role” in the collapse, though it points out, “No fire was observed or reported in the afternoon on floors 1-5, 10, or above Floor 13.” It also says, “there may have been some physical damage on the south side of the building.” NIST summarizes its working hypothesis of the WTC 7 collapse as follows:
bullet “An initial local failure at the lower floors (below Floor 13) of the building due to fire and/or debris induced structural damage of a critical column (the initiating event), which supported a large span floor bay with an area of about 2,000 square feet.”
bullet “Vertical progression of the initial local failure up to the east penthouse, as large floor bays were unable to redistribute the loads, bringing down the interior structure below the east penthouse.”
bullet “Horizontal progression of the failure across the lower floors… triggered by damage due to the vertical failure, resulting in the disproportionate collapse of the entire structure.”
NIST claims this hypothesis “is consistent with all evidence currently held by NIST, including photographs and videos, eyewitness accounts and emergency communication records,” but says it “will be revised and updated as results of ongoing, more comprehensive analyses become available.” [National Institute of Standards and Technology, 6/2004, pp. L1, L3, L17, L34, L38, L51-L52; National Institute of Standards and Technology, 6/18/2004] NIST will release its final reports on the collapses of the Twin Towers in October 2005 (see October 26, 2005). As of mid-2007, it has yet to release a final report on the collapse of WTC 7. In early 2006, Dr. S. Shyam Sunder, who is the lead investigator for NIST’s WTC investigation, will admit, “truthfully, I don’t really know” what caused WTC 7 to collapse. He will add, “We’ve had trouble getting a handle on building no. 7” (see March 20, 2006). [New York Magazine, 3/20/2006] An earlier report on the WTC collapses, released by the Federal Emergency Management Agency (FEMA) in May 2002, had been inconclusive on what caused WTC 7 to collapse, and stated that “Further research, investigation, and analyses” were necessary (see May 1, 2002). [Federal Emergency Management Agency, 5/1/2002, pp. 5-31]

Entity Tags: World Trade Center, National Institute of Standards and Technology

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Shyam Sunder.Shyam Sunder. [Source: NIST]The National Institute of Standards and Technology (NIST) releases nearly 500 pages of documents, detailing the latest findings of its investigation of the WTC collapses on 9/11. These include its hypotheses for the collapse sequences of each of the Twin Towers; details of their analysis of interviews with nearly 1,200 building occupants, emergency responders, and victims’ relatives; and information from their analysis of the emergency response and evacuation procedures. Their investigation into the collapses is based upon an analysis of thousands of photos and videos, examination of many of the elements used to construct the towers, and computer-enhanced modeling of the plane impacts and the spreading of the fires. Their hypothesis is that the towers collapsed ultimately due to the fires they suffered: As the fires burned, the buildings’ steel core columns buckled and shortened. This shifted more load to the buildings’ perimeter columns, which were already affected by the heat of the fires, and caused them to give way under the increased stress. Investigators have conducted a test with a reconstructed section of the WTC floor, and found that the original fireproofing was sufficient to meet the New York City building code. They say that had a typical office fire occurred in the towers, without the structural damage and the loss of some fireproofing caused by the plane impacts, it is likely the buildings would have remained standing. Lead investigator Dr. Shyam Sunder says, “The buildings performed as they should have in the airplane impact and extreme fires to which they were subjected. There is nothing there that stands out as abnormal.” NIST’s theories of why the WTC buildings collapsed conflict with an earlier investigation by FEMA, which claimed the collapse of the North Tower had begun in its core, rather than its perimeter columns (see May 1, 2002). [National Institute of Standards and Technology, 10/19/2004; New York Times, 10/20/2004]

Entity Tags: Shyam Sunder, National Institute of Standards and Technology, World Trade Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Based upon its three-year investigation of the WTC collapses, the National Institute of Standards and Technology (NIST) calls for changes in the planning, construction, and operation of skyscrapers. NIST releases 43 draft reports, totaling about 10,000 pages, for public comments. These include 25 pages of recommendations, intended to learn from 9/11 and make building occupants and emergency responders safer in any future disasters. NIST’s inquiry has been conducted by more than 200 technical experts and contractors, and had two main parts: to look at the causes of the collapses and to identify weaknesses in building codes. Their recommendations include specific improvements to building standards, codes and practices; changes to evacuation and emergency response procedures; and research to help prevent future building failures. NIST does not have the authority to change building codes, but hopes to influence the policies of local authorities. The cost of implementing their recommended changes would add an estimated extra 2 to 5 percent to the development costs of buildings. Some are critical of their recommendations. Structural engineer Jon Magnusson, whose firm is the descendant of the company that designed the Twin Towers, says, “They are leading the public down the wrong path. They are saying we are going to fix the codes in order to deal with Sept. 11th. The physics say that you can’t do that.” [New York Times, 6/22/2005; National Institute of Standards and Technology, 6/23/2005; Associated Press, 6/24/2005] The New York Times points out that between 1989 and 1999, only five civilians had been killed in some 6,900 reported high-rise office building fires within the US. [New York Times, 6/24/2005] NIST will release its final report on the Twin Towers collapses four months later (see October 26, 2005).

Entity Tags: National Institute of Standards and Technology, World Trade Center, Jon Magnusson

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The 43 NIST reports ran to over 10,000 pages.The 43 NIST reports ran to over 10,000 pages. [Source: NIST]The National Institute of Standards and Technology (NIST) issues the final report of its three-year, $16 million study into the WTC collapses on 9/11. NIST has produced over 10,000 pages of findings, and its report includes 30 recommendations for improving building safety, such as having wider stairwells and structurally hardened elevators for use in emergencies. The recommendations are mostly the same as those outlined in an earlier draft of the report (see June 23, 2005). [Engineering News-Record, 10/27/2005; New York Times, 10/27/2005] NIST has made some amendments and clarifications, though, based upon nearly 500 comments received during a six-week public review period. [National Institute of Standards and Technology, 10/26/2005] NIST’s theory about what caused the Twin Towers to collapse remains the same as that described in its previously released findings (see October 19, 2004). However, the NIST’s account only examines events up to the initiation of each collapse; the investigation “does not actually include the structural behavior of the tower after the conditions for collapse initiation were reached and collapse became inevitable.” [National Institute of Standards and Technology, 9/2005, pp. 82] NIST makes no mention of molten metal found at the collapse site in the weeks and months after 9/11, which has been described in numerous reports (see September 12, 2001-February 2002). The “NIST found no corroborating evidence for alternative hypotheses suggesting that the WTC towers were brought down by controlled demolition using explosives planted prior to September 11, 2001.” [National Institute of Standards and Technology, 9/2005, pp. 146] Members of Congress are critical of NIST’s recommendations, saying they are not detailed enough, or adequately documented, to be rapidly incorporated into standard building code publications. [New York Times, 10/27/2005] According to Glenn Corbett, a technical adviser to NIST and fire science professor at John Jay College, NIST is not aggressive enough to carry out major forensic investigations. He says, “Instead of a gumshoe inquiry that left no stone unturned, I believe the investigations were treated more like research projects in which they waited for information to flow to them.” [Associated Press, 10/26/2005; US Congress, 10/26/2005 pdf file] NIST will release its final report on the collapse of Building 7 of the WTC separately, at a later date. [National Institute of Standards and Technology, 9/2005, pp. xiii]

Entity Tags: World Trade Center, Glenn Corbett, National Institute of Standards and Technology

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

A poll by Ohio University and Scripps Howard News Service finds that a significant minority of Americans believe there was US government complicity in the 9/11 attacks. Thirty-six percent of the 1,010 respondents say they believe that US government officials “either assisted in the 9/11 attacks or took no action to stop the attacks because they wanted the United States to go to war in the Middle East.” Sixteen percent believe that secretly planted explosives brought down the Twin Towers, and 12 percent believe a military cruise missile, rather than a hijacked aircraft, hit the Pentagon. [Scripps Howard News Service, 8/3/2006; San Francisco Chronicle, 9/3/2006] An earlier poll had found that half of New York City residents believed government officials knew in advance of the attacks and consciously failed to act (see August 30, 2004).

Entity Tags: Ohio University, Scripps Howard News Service

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

One of the ‘puffs of smoke’ observed during the Twin Towers collapses.One of the ‘puffs of smoke’ observed during the Twin Towers collapses. [Source: Richard Lethin]The National Institute of Standards and Technology (NIST) issues a seven-page fact sheet to counter alternative theories about the WTC collapses. NIST conducted a three-year study of the collapses, and concluded they were caused by the damage when the planes hit combined with the effects of the ensuing fires. However, many people—what the New York Times calls an “angry minority”—believe there was US government complicity in 9/11, and a recent poll (see July 6-24, 2006) found 16 percent of Americans believe the WTC towers were brought down with explosives. [National Institute of Standards and Technology, 8/31/2006; New York Times, 9/2/2006; Reuters, 9/2/2006] The fact sheet responds to 14 “Frequently Asked Questions.” Some of its key points include the following:
bullet Regarding whether NIST considered a controlled demolition hypothesis: “NIST found no corroborating evidence for alternative hypotheses suggesting that the WTC towers were brought down… using explosives… Instead, photographs and videos from several angles clearly show that the collapse initiated at the fire and impact floors and that the collapse progressed from the initiating floors downward until the dust clouds obscured the view.” However, it admits, “NIST did not test for the residue” of explosives in the remaining steel from the towers.
bullet Its explanation for puffs of smoke seen coming from each tower as it collapsed: “[T]he falling mass of the building compressed the air ahead of it—much like the action of a piston—forcing smoke and debris out the windows as the stories below failed sequentially.”
bullet Its explanation for a stream of yellow molten metal that poured down the side of the South Tower shortly before it collapsed (see (9:50 a.m.) September 11, 2001). NIST previously claimed it was aluminum, but this should not have been yellow in color: “Pure liquid aluminum would be expected to appear silvery. However, the molten metal was very likely mixed with large amounts of hot, partially burned, solid organic materials (e.g., furniture, carpets, partitions and computers) which can display an orange glow.”
bullet Regarding reports of molten steel in the wreckage at Ground Zero (see September 12, 2001-February 2002): “Any molten steel in the wreckage was more likely due to the high temperature resulting from long exposure to combustion within the pile than to short exposure to fires or explosions while the buildings were standing.”
bullet Regarding the collapse of WTC 7 (see (5:20 p.m.) September 11, 2001): “While NIST has found no evidence of a blast or controlled demolition event, NIST would like to determine the magnitude of hypothetical blast scenarios that could have led to the structural failure of one or more critical elements.” [National Institute of Standards and Technology, 8/30/2006] In response to the fact sheet, Kevin Ryan, the coeditor of the online Journal of 9/11 Studies, says, “The list of answers NIST has provided is generating more questions, and more skepticism, than ever before.” He says, “NIST is a group of government scientists whose leaders are Bush appointees, and therefore their report is not likely to veer from the political story.” [New York Times, 9/2/2006; Reuters, 9/2/2006]

Entity Tags: National Institute of Standards and Technology, Kevin Ryan

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

In a reply to criticisms of its World Trade Center investigation, the National Institute of Standards and Technology (NIST) admits that it is unable to fully explain the total collapse of the Twin Towers on 9/11. NIST’s letter is a response to a “request for correction” letter sent to it five months earlier by Bob McIlvaine and Bill Doyle, who both lost family members on 9/11, along with scientists Kevin Ryan and Steven E. Jones, architect Richard Gage, and the group Scholars for 9/11 Truth and Justice. This letter made several assertions about NIST’s final reports of its WTC investigation, and suggested they had violated the Data Quality Act and NIST’s information quality standards. NIST’s reply denies the requests for corrections. However, it also mentions, “[W]e are unable to provide a full explanation of the total collapse” of the World Trade Center. [National Institute of Standards and Technology, 9/27/2007 pdf file] In its final report on the Twin Towers collapses, released in October 2005, NIST admitted that its investigation did “not actually include the structural behavior of the tower after the conditions for collapse initiation were reached and collapse became inevitable” (see October 26, 2005). [National Institute of Standards and Technology, 9/2005, pp. 82]

Entity Tags: National Institute of Standards and Technology, World Trade Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The National Institute of Standards and Technology (NIST) publishes a fact sheet responding to 14 “frequently asked questions” about its investigation into the collapse of the Twin Towers on September 11. Some of the key questions and answers are as follows:
bullet Regarding the question, “Why was the collapse of WTC 1 and 2 not arrested by the intact structure below the floors where columns first began to buckle?” NIST replies, “The vertical capacity of the connections supporting an intact floor below the level of collapse was adequate to carry the load of 11 additional floors if the load was applied gradually and 6 additional floors if the load was applied suddenly (as was the case).” As the number of floors above the points where the collapses initiated exceeded six (12 in the case of the North Tower, 29 for the South), NIST says, “[T]he floors below the level of collapse initiation were unable to resist the suddenly applied gravitational load from the upper floors of the buildings.”
bullet In answer to the question of “Why was physical evidence not collected immediately following the collapse of the WTC towers,” NIST says, “In the initial days and weeks following the WTC disaster, the emphasis was on rescue and later on recovery, necessitating the removal of steel and disturbing the collapse site.” It adds, “NIST did not receive the legal authority to collect and preserve physical evidence from a disaster/failure site until the National Construction Safety Team Act became law in October 2002.” The decision to rapidly scrap the remaining steel from the WTC was made shortly after 9/11 (see Shortly After September 11, 2001), but the destruction of this steel was strongly protested by some within the engineering and firefighting communities (see December 25, 2001 and January 4, 2002).
bullet In response to a question about why it did not use its subpoena authority during its investigation, NIST states that its “experience during the investigation was that it was able to obtain all essential documentary and visual evidence without the need to invoke subpoena authority.”
bullet In answer to the question, “Why didn’t NIST fully model the collapse initiation and propagation of WTC towers?” NIST says, “Once the collapse had begun, the propagation of the collapse was readily explained without the same complexity of modeling” as was used to determine the sequence of events leading up to the collapse initiation.
bullet During its investigation, NIST had selected several variables for its computer simulations, and then experimented with different possible values (see (October 2002-October 2005)). But it has been asked: “Why didn’t NIST consider the ‘base’ and ‘less severe’ cases throughout its analysis of the WTC towers? What was the technical basis for selecting only the ‘more severe’ case for its analyses?” Its answer is that, “Of the three [possible values], the more severe case resulted in the closest agreement with the visual and physical evidence.” [National Institute of Standards and Technology, 12/14/2007]
NIST published its final report on the Twin Towers collapse in October 2005 (see October 26, 2005). It released an earlier fact sheet answering previous “frequently asked questions” in August 2006 (see August 30, 2006). [National Institute of Standards and Technology, 8/30/2006]

Entity Tags: National Institute of Standards and Technology

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Explosives on a chipExplosives on a chip [Source: Gary Meek/Georgia Institute of Technology]According to an article published in The Environmentalist, a peer-reviewed scientific journal published by Springer Netherlands, air quality data collected by the Environmental Protection Agency (EPA) at Ground Zero support the hypothesis that cutting charges made with thermite were used to demolish the World Trade Center. The article by authors (and 9/11 truth activists) Kevin Ryan, James Gourley, and Steven Jones says the presence of thermite would best explain three major documented anomalies: [Ryan, Gourley, and Jones, 8/4/2008]
1) The Persistence of Fires at Ground Zero - As has been extensively reported, the rubble at Ground Zero continued to burn for months after 9/11, despite rain as well as firefighters’ use of large quantities of water and of the chemical fire suppressant Pyrocool. [New York Times, 11/19/2001] There is also eyewitness and photographic evidence of molten metal (see September 12, 2001-February 2002) and of explosions accompanied by white dust clouds. The book Aftermath: World Trade Center Archive by photographer Joel Meyerowitz shows a picture of such an explosion taking place on November 8, 2001. [Meyerowitz, 2006, pp. 178] Another photography books by NYPD officer John Botte also shows a picture of smoke emerging from the pile at Ground Zero and explains: “Occasionally, a huge flame would shoot out from the middle of the pile, sounding like a blow torch, as it did here.” [Botte, 2006, pp. 48-49]
2) Spikes of Certain Chemicals in the Air - EPA data shows that several spikes of chemical products of combustion, called volatile organic chemicals (VOC), occurred in October and November 2001, and in February 2002. According to the authors, these spikes indicate “abrupt, violent fires.”
3) The Presence of 1,3-Diphenylpropane - A third anomaly was the presence of large quantities of 1,3-diphenylpropane (1,3-DPP) in the air, a chemical that had not been found in previous structure fires. An EPA scientist told Newsday, “We’ve never observed it in any sampling we’ve ever done.” [Newsday, 9/14/2003]
A possible explanation would be the presence of novel “energetic nanocomposites” which include 1,3-DPP, according to scientific articles reviewed by Ryan et al. Such materials are “amenable to spray-on applications.” A 2002 report said: “The energetic coating dries to give a nice adherent film. Preliminary experiments indicate that films of the hybrid material are self-propagating when ignited by thermal stimulus.” [Ryan, Gourley, and Jones, 8/4/2008] The main center for nanocomposites research is Lawrence Livermore National Laboratory (LLNL). An October 2000 article in a LLNL publication provided an introduction to the research conducted there: “Energetic nanocomposites have a fuel component and an oxidizer component mixed together. […] In one such material (termed a thermite pyrotechnic), iron oxide gel reacts with metallic aluminum particles to release an enormous amount of heat. ‘These reactions typically produce temperatures in excess of 3,500 degrees Celsius’ says [LLNL researcher Randy] Simpson.” [Science & Technology Review, 10/2000] The authors conclude that “[t]he presence of energetic materials, specifically energetic nanocomposites, at [Ground Zero], has the potential to explain much of the unusual environmental data seen at the WTC. Thermite […] is such a pyrotechnic mixture that cannot be easily extinguished and is a common component of energetic nanocomposites.… [T]he detection of 1,3-DPP at the WTC supports this hypothesis. Finally, the spikes in VOCs, detected by EPA on specific dates, are more readily explained as a result of short-lived, violent fires caused by energetic materials.” [Ryan, Gourley, and Jones, 8/4/2008]

Entity Tags: Steven E. Jones, James R. Gourley, Environmental Protection Agency, Kevin Ryan

Timeline Tags: Complete 911 Timeline

NIST lead investigator Shyam Sunder answering questions about NIST’s three-year study of the collapse of WTC 7.NIST lead investigator Shyam Sunder answering questions about NIST’s three-year study of the collapse of WTC 7. [Source: Don Berkemeyer / National Institute of Standards and Technology]The National Institute of Standards and Technology (NIST) announces the findings of its study of the collapse of World Trade Center Building 7, and says the 47-story tower fell late in the afternoon of 9/11 primarily due to fires. [National Institute of Standards and Technology, 8/21/2008; National Institute of Standards and Technology, 8/21/2008] NIST releases its findings as part of a 915-page report, which is the result of three years’ work by over 50 federal investigators and a dozen contractors (see August 21, 2008). [New York Times, 8/21/2008]
Collapse Is 'No Longer a Mystery' - In a news conference at NIST’s headquarters in Gaithersburg, Maryland, lead investigator Shyam Sunder admits: “[W]e knew from the beginning of our study that understanding what happened to Building 7 on 9/11 would be difficult. It did not fit any textbook description that you could readily point to and say, yes, that’s why the building failed.” But, he says, “[T]he reason for the collapse of World Trade Center 7 is no longer a mystery.” [National Institute of Standards and Technology, 8/21/2008; New York Times, 8/21/2008]
'New Phenomenon' Caused Collapse - Sunder says the “critical factor” that initiated the collapse was “thermal expansion of long-span floor systems located in the east side of the building,” and adds that NIST’s study “has identified thermal expansion as a new phenomenon that can cause structural collapse. For the first time we have shown that fire can induce a progressive collapse.”
Collapse Sequence - Sunder describes the sequence of events NIST believes led to the collapse of WTC 7. He says debris from the collapse of the north WTC tower “started fires on at least 10 floors of the building. The fires burned out of control on six of these 10 floors for about seven hours. The city water main had been cut by the collapse of the two WTC towers, so the sprinklers in Building 7 did not function for much of the bottom half of the building.” He continues: “Fires on floors 7 through 9 and 11 through 13 were particularly severe.… Eventually, a girder on floor 13 lost its connection to a critical interior column.” Floor 13 collapsed, beginning a cascade of floor failures down to the fifth floor. “With the support of these floors gone, column 79 buckled, which initiated the fire-induced progressive collapse of the building.… This in turn caused the failure of nearby columns 80 and 81 and floor failures up to the roof line.… As the roof line begins to fall adjacent columns buckle as well. In quick succession, the remaining interior columns failed from east to west across WTC 7, until the entire core began moving downward. Finally, the remaining outer shell or façade of the building fell.”
NIST Created 'Virtual WTC 7' Model - Sunder says that NIST reached its conclusions about the collapse “by reconstructing the entire building, beam by beam, column by column, connection by connection into a computer model, a virtual WTC 7 building. We then filled that virtual building with as much detail as possible about exactly what types of furnishings were on each floor. Then we set fire to those virtual offices on the floors where video and other visual evidence told us the fires burned.” The investigators “used a well-validated computer program developed at NIST, for studying the growth and spread of fires, to calculate temperatures throughout the building.… And we used well-established data on the properties of structural steel, the sprayed fire resistive material or fireproofing, and other building materials to determine how those temperatures affected the structure.”
Explosives Not Used - Sunder says that the investigators “did not find any evidence that explosives were used to bring the building down” (see August 21, 2008), nor was the collapse “due to fires from the substantial amount of diesel fuel stored in the building” (see August 21, 2008). NIST commenced its investigation of the WTC collapses in 2002 (see August 21, 2002) and issued its findings on the collapses of the Twin Towers in October 2005 (see October 26, 2005). Since then it has been focused on WTC 7. [Government Computer News, 8/21/2008; National Institute of Standards and Technology, 8/21/2008]
Final Report to Be Released - After suggestions are made by members of the public in response to its current report, NIST will release a finished version of the same report in November 2008, thereby completing its WTC investigation (see November 20, 2008). [National Institute of Standards and Technology, 11/20/2008]

Entity Tags: World Trade Center, National Institute of Standards and Technology, Shyam Sunder

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

NIST’s ‘Final Report on the Collapse of World Trade Center Building 7.’NIST’s ‘Final Report on the Collapse of World Trade Center Building 7.’ [Source: National Institute of Standards and Technology.]The National Institute of Standards and Technology (NIST) releases the final report of its three-year investigation of the collapse of World Trade Center Building 7, the 47-story skyscraper which collapsed late in the afternoon of 9/11 (see (5:20 p.m.) September 11, 2001). This is the completed version of the report, and comes three months after a draft version was released for public comment (see August 21, 2008). NIST states that the new report “is strengthened by clarifications and supplemental text suggested by organizations and individuals worldwide in response to the draft WTC 7 report.” NIST conducted an additional computer analysis in response to comments from the building community, and made several minor amendments to the report. But, it says, “the revisions did not alter the investigation team’s major findings and recommendations, which include identification of fire as the primary cause for the building’s failure.” With the release of this report, NIST has completed its six-year investigation of the World Trade Center collapses, which it commenced in August 2002 (see August 21, 2002). The final report of its investigation of the Twin Towers’ collapses was published in October 2005 (see October 26, 2005). [National Institute of Standards and Technology, 11/20/2008; Occupational Health and Safety, 11/25/2008]

Entity Tags: World Trade Center, National Institute of Standards and Technology

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

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