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Context of 'March 6, 2002: House Committee on Science Holds Hearing on WTC Collapses Investigation'

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Larry Silverstein.
Larry Silverstein. [Source: Silverstein Properties publicity photo]Real estate development and investment firm Silverstein Properties and real estate investment trust Westfield America Inc. finalize a deal worth $3.2 billion to purchase a 99-year lease on the World Trade Center. The agreement covers the Twin Towers, World Trade Center Buildings 4 and 5 (two nine-story office buildings), and about 425,000 square feet of retail space. [New York Times, 4/27/2001; Port Authority of New York and New Jersey, 7/24/2001; IREIzine, 7/26/2001] Westfield America Inc. will be responsible for the retail space, known as the Mall. Silverstein Properties’ lease will cover the roughly 10 million square feet of office space of the Twin Towers and Buildings 4 and 5. Silverstein Properties already owns Building 7 of the WTC, which it built in 1987. This is the only time the WTC has ever changed hands since it was opened in 1973. [International Council of Shopping Centers, 4/27/2001; Westfield Group, 7/24/2001; Daily Telegraph, 9/11/2001; New York Times, 11/29/2001; CNN, 8/31/2002] It was previously controlled by the New York Port Authority, a bi-state government agency. [Wall Street Journal, 5/12/2007] Silverstein and Westfield are given the right to rebuild the structures if they are destroyed. [New Yorker, 5/20/2002]
Silverstein Properties Not the Highest Bidder - Silverstein Properties’ bid for the WTC, at $3.22 billion, was the second highest after Vornado Realty Trust’s, at $3.25 billion. Silverstein Properties won the contract only after protracted negotiations between the Port Authority and Vornado Realty Trust failed. The privatization of the WTC has been overseen by Lewis M. Eisenberg, the chairman of the Port Authority. Eisenberg, a financier, is involved in Republican politics. [New York Times, 3/17/2001; Forward, 8/20/2004]
Banks Provide Most Money for Deal - Larry Silverstein, the president of Silverstein Properties, only uses $14 million of his own money for the deal. His partners, who include real estate investors Lloyd Goldman and Joseph Cayre, put up a further $111 million, and banks provide $563 million in loans. [Brill, 2003, pp. 156; New York Times, 11/22/2003; South Florida CEO, 2/2005; Wall Street Journal, 9/11/2008]
Silverstein's Lenders Want More Insurance - The Port Authority had carried only $1.5 billion in insurance coverage on all its buildings, including the WTC, but Silverstein’s lenders insist on more, eventually demanding $3.55 billion in cover. [American Lawyer, 9/3/2002] After 9/11, Larry Silverstein will claim the attacks on the World Trade Center constituted two separate events, thereby entitling him to a double payout totaling over $7 billion. [Daily Telegraph, 10/9/2001; Guardian, 8/18/2002] Eventually, after several years of legal wrangling, a total of $4.55 billion of insurance money will be paid out for the destruction of the WTC (see May 23, 2007). Most of this appears to go to Silverstein Properties. How much goes to Westfield America Inc. is unclear. [New York Post, 5/24/2007]

Entity Tags: Vornado Realty Trust, Larry Silverstein, Joseph P. Cayre, Lewis M. Eisenberg, Lloyd Goldman, Port Authority of New York and New Jersey, Westfield America, World Trade Center, Silverstein Properties

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Douglas Karpiloff.Douglas Karpiloff. [Source: Port Authority of New York and New Jersey]A command center for the Port Authority of New York and New Jersey, located in the North Tower of the World Trade Center, is upgraded to make it more secure, and the improvements will reportedly save the lives of people in the command center when the nearby South Tower collapses on September 11. [Newsday, 9/12/2001; Civil Air Patrol News, 1/2002; Newsday, 1/23/2002] The Port Authority’s Security Command Center (SCC) is on the 22nd floor of the North Tower. [9/11 Commission, 5/18/2004 pdf file; 9/11 Commission, 7/24/2004, pp. 294] Newsday will report, on the day after 9/11, that officials had “recently” increased security at the WTC “by installing bulletproof windows and fireproof doors in the 22nd-floor computer command center.” [Newsday, 9/12/2001] According to George Tabeek, the Port Authority’s security manager for the WTC, by September 11, the WTC in fact has “bulletproof window glass in most areas.” [FDU Magazine, 6/2008] The installation of the bulletproof windows—and presumably, also, the fireproof doors—in the SCC is made at the request of Douglas Karpiloff, the Port Authority’s director of security and life safety for the WTC. [Newsday, 1/23/2002]
Upgrades Intended to Protect against 'Aerial Attacks' - According to Hermina Jones, a security guard at the WTC, the upgrades to the SCC are intended “to secure the towers against aerial attacks.” [Newsday, 9/12/2001] Tabeek will later recall, “We had planned for the possibility of a small airplane—a corporate jet, maybe—crashing into one of the [WTC] buildings by accident,” although it is unclear if this comment is made in reference to the installation of bulletproof windows at the WTC. [FDU Magazine, 6/2008]
Security Improvements Save Lives on September 11 - Some people will credit the upgrades to the SCC with saving their lives on September 11. Tabeek will be in the SCC that day when the first of the Twin Towers—the South Tower—collapses (see 9:59 a.m. September 11, 2001). When that happens, according to Tabeek, the “impact of the explosion peeled off the outer skin of [the North Tower], shattering the thick double-paned windows [of the SCC] in the process.” Tabeek will say, however, that the “inner layer of laminated bulletproof glass put in months earlier… withstood the blast and undoubtedly saved his life and those of the others with him.” Victor Guarnera, the chief technical adviser and manager of security systems for the World Trade Department, who is also in the SCC at that time, will describe what happens when the collapse occurs, saying, “The outer windows [of the SCC] exploded, either from impact [of debris from the South Tower] or differential pressure, but the inner window wall of high-tempered bomb and bullet-resistant glass we had installed a few months before held fast.” Guarnera will comment that the bulletproof windows “were responsible for our survival up to that point.” [Civil Air Patrol News, 1/2002; Newsday, 1/23/2002]

Entity Tags: Douglas G. Karpiloff, World Trade Center, George Tabeek, Hermina Jones, Port Authority of New York and New Jersey

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

New York City’s Emergency Operations Center (EOC) set up at Pier 92 on the Hudson River following the 9/11 attacks.New York City’s Emergency Operations Center (EOC) set up at Pier 92 on the Hudson River following the 9/11 attacks. [Source: ArcNews]At Pier 92 on the Hudson River, preparations are underway for a training exercise due to take place there the following day. The exercise, called Tripod, which had been scheduled months earlier, is intended to test how well New York’s Office of Emergency Management (OEM) can administer treatment in response to a biological-terrorism attack (see September 12, 2001). [New York Magazine, 10/15/2001; Giuliani, 2002, pp. 355] Pier 92, located just over four miles north-northwest of the World Trade Center, has been set up as a model distribution station where the simulated victims will be treated. [Jenkins and Edwards-Winslow, 9/2003, pp. 15 and 20 pdf file] Ken Longert, the owner of a theatrical lighting business, arrives at the pier at 7:00 a.m. to help get the place ready for the exercise. He will later recall, “Two or three hundred cadets [presumably with the New York police and fire departments] were there, learning the proper procedures in case some kind of disaster hit New York.” Longert will recall that, seconds after the second WTC tower is hit at 9:03, “all the people from OEM disappeared” from the pier. [DiMarco, 2007, pp. 457-458] After OEM’s original command center is destroyed when WTC 7—where it is located—collapses (see (5:20 p.m.) September 11, 2001), Pier 92 will be selected as the location for the substitute command center. [9/11 Commission, 5/19/2004] Members of OEM staff have also arrived early this morning at the OEM offices in WTC 7 to prepare for the exercise (see (Shortly After 8:46 a.m.) September 11, 2001). [Jenkins and Edwards-Winslow, 9/2003, pp. 15 pdf file]

Entity Tags: Tripod, Office of Emergency Management, Ken Longert

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The hole caused by the Flight 11 crash.The hole caused by the Flight 11 crash. [Source: Reuters]Flight 11 slams into the WTC North Tower (Building 1). Hijackers Mohamed Atta Waleed Alshehri, Wail Alshehri, Abdulaziz Alomari, and Satam Al Suqami presumably are killed instantly, and many more in the tower will die over the next few hours. Seismic records pinpoint the crash at 26 seconds after 8:46 a.m. [CNN, 9/12/2001; New York Times, 9/12/2001; North American Aerospace Defense Command, 9/18/2001; USA Today, 12/20/2001; Federal Emergency Management Agency, 5/1/2002, pp. 1-10; New York Times, 5/26/2002; USA Today, 8/12/2002; Associated Press, 8/21/2002; Newsday, 9/10/2002] The NIST report states the crash time to be 8:46:30. [National Institute of Standards and Technology, 9/2005, pp. 19] The 9/11 Commission Report states the crash time to be 8:46:40. [9/11 Commission, 7/24/2004, pp. 7] Investigators believe the plane still has about 10,000 gallons of fuel (see 8:57 a.m. September 11, 2001). [New York Times, 5/26/2002] The plane strikes the 93rd through 99th floors in the 110-story building. No one above the crash line survives; approximately 1,360 people die. Below the crash line, approximately 72 die and more than 4,000 survive. Both towers are slightly less than half full at the time of the attack, with between 5,000 to 7,000 people in each tower. This number is lower than expected. Many office workers have not yet shown up to work, and tourists to the observation deck opening at 9:30 A.M. have yet to arrive. [USA Today, 12/20/2001; National Institute of Standards and Technology, 9/2005, pp. 20-22] The impact severs some columns on the north side of the North Tower. Each tower is designed as a “tube-in-tube” structure and the steel columns which support its weight are arranged around the perimeter and in the core. The plane, which weighs 283,600 lb and is traveling at an estimated speed of around 430 mph (see October 2002-October 2005), severs 35 of the building’s 236 perimeter columns and damages another two. The damage to the South Tower’s perimeter will be similar (see 9:03 a.m. September 11, 2001). [National Institute of Standards and Technology, 9/2005, pp. 5-9, 20, 22] The perimeter columns bear about half of the tower’s weight, so this damage reduces its ability to bear gravity loads by about 7.5 percent. [National Institute of Standards and Technology, 9/2005, pp. 6] The actual damage to the 47 core columns is not known, as there are no photographs or videos of it, but there will be much speculation about this after 9/11. It will be suggested that some parts of the aircraft may have damaged the core even after crashing through the exterior wall. According to the National Institute of Standards and Technology (NIST): “Moving at 500 mph, an engine broke any exterior column it hit. If the engine missed the floor slab, the majority of the engine core remained intact and had enough residual momentum to sever a core column upon direct impact.” [National Institute of Standards and Technology, 9/2005, pp. 107] According to NIST’s base case computer model, three of the core columns are severed and another ten suffer some damage. [National Institute of Standards & Technology, 9/2005, pp. 189 pdf file] If this is accurate, it means that the impact damage to the core reduces the Tower’s strength by another approximately 7.5 percent, meaning that the building loses about 15 percent of its strength in total. This damage will be cited after 9/11 by NIST and others researchers as an event contributing to the building’s collapse (see October 23, 2002 and October 19, 2004). In addition, some of the fireproofing on the steel columns and trusses may be dislodged. The original fireproofing on the fire floors was mostly Blazeshield DC/F, but some of the fireproofing on the flooring has recently been upgraded to Blazeshield II, which is about 20 percent denser and 20 percent more adhesive. [National Institute of Standards & Technology, 9/2005, pp. xxxvi, 83 pdf file] Photographs and videos of the towers will not show the state of fireproofing inside the buildings, but NIST will estimate the damage to it using a computer model. Its severe case model (see (October 2002-October 2005)) will predict that 43 of the 47 core columns are stripped of their fireproofing on one or more floors and that fireproofing is stripped from trusses covering 60,000 ft2 of floor area, the equivalent of about one and a half floors. NIST will say that the loss of fireproofing is a major cause of the collapse (see April 5, 2005), but only performs 15 tests on fireproofing samples (see October 26, 2005). [National Institute of Standards and Technology, 9/2005, pp. 23] According to NIST, more fireproofing is stripped from the South Tower (see 9:03 a.m. September 11, 2001).

Entity Tags: Mohamed Atta, National Institute of Standards and Technology, Satam Al Suqami, Waleed Alshehri, Abdulaziz Alomari, World Trade Center, Wail Alshehri

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Bruce Baughman.Bruce Baughman. [Source: Elise Moore / FEMA]Bruce Baughman, director of the planning and readiness division of the Federal Emergency Management Agency (FEMA), takes charge at FEMA headquarters in Washington, DC, because more senior FEMA officials, including the agency’s director, are away from the capital. FEMA Director Joseph Allbaugh and Lacy Suiter, FEMA’s assistant director of readiness, response, and recovery, are in Big Sky, Montana, attending the annual conference of the National Emergency Management Association (see September 8-11, 2001 and After 8:46 a.m. September 11, 2001). Baughman, who led FEMA’s response to the Oklahoma City bombing in April 1995 (see 8:35 a.m. - 9:02 a.m. April 19, 1995), therefore has to take charge of FEMA’s response to today’s terrorist attacks. In this capacity, he is responsible for activating FEMA’s emergency operations center, dispatching disaster medical personnel to the scenes of the attacks, and establishing emergency communications for New York. After the Twin Towers come down (see 9:59 a.m. September 11, 2001 and 10:28 a.m. September 11, 2001), he calls up the first FEMA urban search and rescue teams, which specialize in rescuing people from collapsed structures. [Block and Cooper, 2006, pp. 73-75] He will subsequently personally brief President Bush on three days while response operations are underway. [9/11 Commission, 11/17/2003 pdf file]
FEMA Will Help Local Agencies Respond to the Attacks - In May, Bush put FEMA in charge of responding to terrorist attacks in the United States (see May 8, 2001). [White House, 5/8/2001; Los Angeles Times, 5/9/2001] The agency therefore plays a key role in the government’s response to today’s attacks. The emergency response team at its headquarters is activated today, along with all 10 of its regional operations centers. It also activates its federal response plan, which, it states, “brings together 28 federal agencies and the American Red Cross to assist local and state governments in response to national emergencies and disasters.” It deploys eight urban search and rescue teams to New York to search for victims in the debris from the collapsed World Trade Center buildings, and four urban search and rescue teams to the Pentagon to assist the response there. These teams consist mainly of local emergency services personnel, and are trained and equipped to handle structural collapses. [Federal Emergency Management Agency, 9/11/2001; Federal Emergency Management Agency, 9/11/2001; US National Response Team, 2014, pp. 2 pdf file] In the days and weeks following the attacks, it will work with state and city officials to carry out the task of removing the debris from the WTC site. [Block and Cooper, 2006, pp. 75]

Entity Tags: Federal Emergency Management Agency, Joseph M. Allbaugh, Bruce Baughman, Lacy E. Suiter

Timeline Tags: Complete 911 Timeline

An announcement is made over the public address system in the South Tower of the World Trade Center, advising workers that they can begin an orderly evacuation of the building if conditions warrant it. [New York Times, 5/17/2004; 9/11 Commission, 7/24/2004, pp. 289] A previous announcement over the public address system instructed people in the South Tower to stay in, or return to, their offices, rather than evacuate (see (8:50 a.m.) September 11, 2001). [9/11 Commission, 7/24/2004, pp. 287-288; Dwyer and Flynn, 2005, pp. 72] The new announcement begins: “May I have your attention, please. Repeating this message: the situation occurred in Building 1 [i.e. the North Tower].” The announcer then says, “If the conditions warrant on your floor, you may wish to start an orderly evacuation.” [New York Times, 5/17/2004] The announcement is presumably made by Philip Hayes, the deputy fire safety director on duty at the fire command desk in the lobby of the South Tower. A button at the desk enables fire safety directors to deliver announcements over the public address system. [Dwyer and Flynn, 2005, pp. 26]
Identity of Person Who Ordered Evacuation Unclear - The new advice, for tenants to evacuate, does “not correspond to any prewritten emergency instruction,” according to the 9/11 Commission Report. [9/11 Commission, 7/24/2004, pp. 289] It is unclear who told Hayes to make the announcement giving this advice. George Tabeek, the Port Authority’s security manager for the WTC, contacted the fire command desks in the Twin Towers immediately after Flight 11 hit the North Tower, with instructions about what to do. His orders for Hayes, however, were to “keep people inside the South Tower” (see Shortly After 8:46 a.m. September 11, 2001). [New Jersey Star-Ledger, 9/6/2011]
Police Commander Called for Evacuation of WTC - Captain Anthony Whitaker, the Port Authority Police Department (PAPD) commanding officer at the WTC, called for the evacuation of the WTC at 9:00 a.m. (see 8:59 a.m.-9:02 a.m. September 11, 2001). However, his instruction was given over PAPD radio channel W, “which could not be heard by the deputy fire safety director in the South Tower,” according to the 9/11 Commission Report. [Murphy, 2002, pp. 184-185; 9/11 Commission, 7/24/2004, pp. 293; National Institute of Standards and Technology, 9/2005, pp. 201] Furthermore, according to the Port Authority, deputy fire safety directors do not generally take direct orders from the PAPD under the regular chain of command. Therefore, the 9/11 Commission Report will state, it is “not known if [Hayes] received the order by the PAPD to evacuate the complex.” [9/11 Commission, 7/24/2004, pp. 544]
Fire Department Responsible for Ordering Evacuations - According to New York Times reporters Jim Dwyer and Kevin Flynn, “The authority to order an evacuation during a fire normally rests with the fire department.” [Dwyer and Flynn, 2005, pp. 79] In a phone call with his counterpart in the North Tower, at 8:49 a.m., Hayes in fact said he would wait to hear from “the boss from the fire department or somebody” before ordering an evacuation of the South Tower (see 8:49 a.m. September 11, 2001). [Port Authority of New York and New Jersey, 9/11/2001 pdf file; 9/11 Commission, 7/24/2004, pp. 287; Dwyer and Flynn, 2005, pp. 27] But whether someone from the fire department told Hayes to order an evacuation is unknown. It is also unclear how long announcements, advising an evacuation, continue for. Hayes and his counterpart in the North Tower are “making announcements that the situation was serious and that occupants should evacuate immediately” for “[a]s long as the [fire alarm system] was still operational,” according to Fire Engineering magazine. [Fire Engineering, 11/1/2002] However, the 9/11 Commission Report will state, “Evidence suggests that the public address system [in the South Tower] did not continue to function after the building was hit.” This would mean no announcements go out after 9:03 a.m., when Flight 175 hits the tower (see 9:03 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 295] By the time the South Tower collapses (see 9:59 a.m. September 11, 2001), out of around 8,540 people who were originally in the building, 7,940 (93 percent) have made it out and will survive, according to the National Institute of Standards and Technology. [National Institute of Standards and Technology, 9/2005]

Entity Tags: Philip T. Hayes

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Flight 175 hits the WTC South Tower. The picture was taken from a traffic helicopter.Flight 175 hits the WTC South Tower. The picture was taken from a traffic helicopter. [Source: WABC 7/ Salient Stills]Flight 175 hits the South Tower of the World Trade Center (Tower Two). Seismic records pinpoint the time at six seconds before 9:03 a.m. (rounded to 9:03 a.m.). Hijackers Marwan Alshehhi, Fayez Ahmed Banihammad, Mohand Alshehri, Hamza Alghamdi, and Ahmed Alghamdi presumably are killed instantly, and many more in the tower will die over the next few hours. [New York Times, 9/12/2001; CNN, 9/12/2001; CNN, 9/17/2001; North American Aerospace Defense Command, 9/18/2001; USA Today, 12/20/2001; Federal Emergency Management Agency, 5/1/2002, pp. 1-10; New York Times, 5/26/2002; Associated Press, 8/21/2002; USA Today, 9/2/2002] According to the NIST report, the crash time is 9:02:59. [National Institute of Standards and Technology, 9/2005, pp. 38] According to the 9/11 Commission Report, the crash time is 9:03:11. [9/11 Commission, 7/24/2004, pp. 8] Millions watch the crash live on television. The plane strikes the 77th through 85th floors in the 110-story building. Approximately 100 people are killed or injured in the initial impact; 600 people in the tower eventually die. The death toll is far lower than in the North Tower because about two-thirds of the South Tower’s occupants have evacuated the building in the 17 minutes since the first tower was struck. [USA Today, 12/20/2001; National Institute of Standards and Technology, 9/2005, pp. 5-9, 41] The combined death toll from the two towers is estimated at 2,819, not including the hijackers. [Associated Press, 8/21/2002] The impact severs some columns on the south side of the South Tower. Each of the Twin Towers is designed as a “tube-in-tube” structure and the steel columns which support its weight are arranged around the perimeter and in the core. The plane, which is traveling at an estimated speed of around 500 mph (see October 2002-October 2005), severs 33 of the building’s 236 perimeter columns and damages another one. [National Institute of Standards and Technology, 9/2005, pp. 39] The perimeter columns bear about half of the tower’s weight, so the damage to them reduces the tower’s ability to bear gravity loads by about 7.1 percent. [National Institute of Standards and Technology, 9/2005, pp. 6] The actual damage to the 47 core columns is not known, as there are no photographs or videos of it, but there will be much speculation about this after 9/11. It will be suggested that some parts of the aircraft may be able to damage the core even after crashing through the exterior wall (see 8:46 a.m. September 11, 2001). [National Institute of Standards and Technology, 9/2005, pp. 107] According to NIST’s base case model, five of the core columns are severed and another five suffer some damage. [National Institute of Standards & Technology, 9/2005, pp. 235 pdf file] This may reduce the tower’s ability to bear loads by a further approximately 8 percent, meaning that the aircraft impact accounted for a loss of about 15 percent of the building’s strength. This damage will be cited as an event contributing to the building’s collapse after 9/11 (see October 23, 2002 and October 19, 2004). NIST’s base case estimate of damage to the North Tower’s core will be similar, even though the aircraft impact there was dissimilar (see 8:46 a.m. September 11, 2001). Flight 11 hit the North Tower’s core head on, whereas Flight 175 only hits the corner of the South Tower’s core. [National Institute of Standards and Technology, 9/2005, pp. 20-23, 38-41] In addition, some of the fireproofing on the steel columns and trusses may be dislodged (see 8:46 a.m. September 11, 2001). [National Institute of Standards & Technology, 9/2005, pp. xxxvi, 83 pdf file] Photographs and videos of the towers will not show the state of fireproofing inside the buildings, but the National Institute of Standards and Technology (NIST) will try to estimate the damage to fireproofing using a series of computer models. Its severe case model (see (October 2002-October 2005)) will predict that 39 of the 47 core columns are stripped of their fireproofing on one or more floors and that fireproofing is stripped from trusses covering 80,000 ft2 of floor area, the equivalent of about two floors. NIST will say that the loss of fireproofing is a major cause of the collapse (see April 5, 2005), but only performs 15 tests on fireproofing samples (see October 26, 2005). [National Institute of Standards and Technology, 9/2005, pp. 41] According to NIST, less fireproofing is stripped from the North Tower (see 8:46 a.m. September 11, 2001).

Entity Tags: World Trade Center, Marwan Alshehhi, Fayez Ahmed Banihammad, Hamza Alghamdi, National Institute of Standards and Technology, Ahmed Alghamdi, Mohand Alshehri

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Mike Dabney.Mike Dabney. [Source: FEMA]Personnel at the Federal Emergency Management Agency (FEMA) Region II office at 26 Federal Plaza in New York are unable to communicate with the city’s emergency command center in World Trade Center Building 7 and so Richard Ohlsen, one of the office’s employees, is sent to the WTC site to liaise with officials there. Personnel in the FEMA office felt their building shake when the first hijacked plane crashed into the WTC, at 8:46 a.m. (see 8:46 a.m. September 11, 2001), but were initially unclear about what had happened. They were able, however, to see the second crash, at 9:03 a.m. (see 9:03 a.m. September 11, 2001), through the windows. Apparently after that crash occurs, “communications almost instantly became a problem and compromised the ability of the Regional Operations Center [i.e. the office at 26 Federal Plaza] to operate,” Ohlsen will later recall. In particular, personnel there are unable to communicate with the city’s Office of Emergency Management (OEM), which has its emergency command center on the 23rd floor of WTC 7. Mike Dabney, the senior FEMA manager in the office, therefore instructs Ohlsen to go to WTC 7, which is within walking distance, and act as an on-site liaison with the OEM there. However, Ohlsen’s departure is delayed because his colleagues are unable to find a working radio or a satellite phone he can take with him. He consequently only heads out at around 9:59 a.m., when the South Tower of the WTC collapses (see 9:59 a.m. September 11, 2001). He will change his plans following the collapse and, instead of heading to WTC 7, go to the command post at the headquarters of the New York Police Department (see After 9:59 a.m. September 11, 2001). [9/11 Commission, 3/16/2004 pdf file; Graff, 2017, pp. 343-344]

Entity Tags: Office of Emergency Management, Mike Dabney, Richard Ohlsen, Federal Emergency Management Agency

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Thomas Von Essen.Thomas Von Essen. [Source: Publicity photo]The Office of Emergency Management’s Emergency Operations Center (EOC) in World Trade Center Building 7 is evacuated in response to a report that more commercial planes are unaccounted for. [9/11 Commission, 7/24/2004, pp. 305] The EOC, which opened in 1999 (see June 8, 1999), is a state-of-the-art facility on the 23rd floor of WTC 7 that is intended to serve as a meeting place for city leaders in the event of an act of terrorism or other kind of crisis. [CNN, 6/7/1999; City of New York, 2/18/2001] Office of Emergency Management (OEM) officials activated it shortly after Flight 11 crashed into the North Tower of the WTC (see (Shortly After 8:46 a.m.) September 11, 2001). [Bylicki, 6/19/2003; 9/11 Commission, 7/24/2004, pp. 293]
Staffers Discussed Evacuation after the First Crash - Soon after the crash occurred, officials in the EOC “began discussing with OEM staff whether or not they should evacuate the building,” according to a report by Tricia Wachtendorf of the Disaster Research Center at the University of Delaware. [Wachtendorf, 2004, pp. 77] Richard Rotanz, deputy director of the OEM, and some other officials in the EOC conducted a “threat analysis” after the second hijacked plane crashed into the WTC, at 9:03 a.m. (see 9:03 a.m. September 11, 2001). [Urban Hazards Forum, 1/2002]
Staffers Want to Stay in the Operations Center - Personnel are reluctant to leave the EOC because in it they have “a tremendous amount of resources at their fingertips” and they are “best able to handle an emergency of this scale,” Wachtendorf will later write. Furthermore, there is no clear procedure to move to or establish an alternative operations center if it is abandoned. “I couldn’t think of where we would go if we left the EOC because at that time we didn’t have a backup facility,” one official will recall. There is, in fact, “no formalized evacuation plan for the EOC,” according to Wachtendorf. [Wachtendorf, 2004, pp. 77-79]
OEM Deputy Director Orders the Evacuation - However, Richard Bylicki, a police sergeant assigned to the OEM, was told during a call with the FAA that at least one other plane, in addition to the two that hit the Twin Towers, is unaccounted for and possibly heading for New York (see (9:30 a.m.) September 11, 2001), and he passed this information on to Rotanz. [Bylicki, 6/19/2003] Rotanz was given the same warning by a Secret Service agent who works in WTC 7. [Urban Hazards Forum, 1/2002; 9/11 Commission, 7/24/2004, pp. 305] Based on this information, he “surmised that [WTC 7] was potentially the next target,” Bylicki will recall. He consequently now orders all OEM employees to leave the building. [Bylicki, 6/19/2003; 9/11 Commission, 4/7/2004] A Secret Service agent, presumably the one who told Rotanz about the additional unaccounted-for planes, also reportedly advises EOC personnel to evacuate. He says, “There’s a reported third plane headed toward the East Coast and we’re warning everybody to vacate the building,” Fire Department Captain Abdo Nahmod will recall. [Journal of Emergency Medical Services, 9/2011, pp. 42 pdf file]
Some Liaisons Have Come to the Operations Center - Various city agencies were contacted after the EOC was activated and instructed to send their designated representatives to the center. None of these representatives have arrived by the time the EOC is evacuated, according to the 9/11 Commission Report. [9/11 Commission, 5/18/2004 pdf file; 9/11 Commission, 7/24/2004, pp. 293, 305] However, contradicting this claim, a number of emergency responders will recall arriving at the EOC before it is evacuated, to serve as representatives for their agencies. [City of New York, 10/11/2001; City of New York, 10/25/2001; City of New York, 12/4/2001; Journal of Emergency Medical Services, 9/2011, pp. 42 pdf file]
Staffers Are Initially Slow to Leave - Personnel reportedly do not initially respond to the evacuation order with a sense of urgency. They “calmly collected personal belongings and began removing OEM records,” a report by the Mineta Transportation Institute will state. But they are subsequently “urged to abandon everything and leave the building quickly.” [Jenkins and Edwards-Winslow, 9/2003, pp. 16 pdf file] After evacuating from the EOC, they assemble in the lobby of WTC 7 and await further instructions over radio. [Bylicki, 6/19/2003] Most of them think they are only temporarily abandoning their facility and expect to return to it later in the day. They do not anticipate WTC 7 being affected by fires (see 4:10 p.m. September 11, 2001) and then collapsing late this afternoon (see (5:20 p.m.) September 11, 2001). [Wachtendorf, 2004, pp. 84]
Fire Commissioner Will Be Surprised That the Center Is Evacuated - Fire Commissioner Thomas Von Essen will be surprised when he finds that the EOC has been evacuated, since the center was designed for dealing with a crisis like the one currently taking place. “I thought that was where we should all be because that’s what [it] was built for,” he will comment. He will arrive at WTC 7 looking for Mayor Rudolph Giuliani shortly before 9:59 a.m., when the South Tower collapses (see 9:59 a.m. September 11, 2001). When he learns that the EOC has been evacuated, he will think: “How ridiculous. We’ve got a 13-million-dollar command center and we can’t even use it.” He will say in frustration: “How can we be evacuating OEM? We really need it now.” [Essen, 2002, pp. 26; Fink and Mathias, 2002, pp. 230]
Time of the Evacuation Is Unclear - It is unclear exactly when the EOC is evacuated. The order to evacuate is issued at “approximately 9:30” a.m., according to the 9/11 Commission Report. [9/11 Commission, 7/24/2004, pp. 305] But, according to a report by the National Institute of Standards of Technology, the evacuation occurs slightly later than this, at “approximately 9:44 a.m.” [National Institute of Standards and Technology, 9/2005, pp. 109] Other accounts will suggest it may even have taken place before the second attack on the WTC occurred (see (Soon After 8:46 a.m.-9:35 a.m.) September 11, 2001 and (Shortly Before 9:03 a.m.) September 11, 2001). [Barrett and Collins, 2006, pp. 34; Dylan Avery, 2007] Many people in the rest of WTC 7 left the building earlier on, around the time of the second attack (see (9:03 a.m.) September 11, 2001). [9/11 Commission, 5/18/2004 pdf file; National Institute of Standards and Technology, 9/2005, pp. 109]

Entity Tags: Office of Emergency Management, Richard Bylicki, Thomas Von Essen, Richard Rotanz, Abdo Nahmod, US Secret Service

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Firefighter Timothy Brown, a supervisor at New York City’s Office of Emergency Management, is told that a suspicious plane that was reportedly flying toward New York has crashed. [Firehouse, 1/31/2003] After the second hijacked plane crashed into the World Trade Center, at 9:03 a.m. (see 9:03 a.m. September 11, 2001), Brown went to the lobby of the South Tower to help open a command post. [Project Rebirth, 6/30/2002 pdf file; TEDx Talks, 10/7/2015] While there, he heard over his radio that another suspicious aircraft, in addition to the planes that hit the Twin Towers, was heading toward New York (see (9:30 a.m.) September 11, 2001). Since then, he has talked to the New York State Emergency Management Office about getting fighter jets to protect New York (see (Shortly After 9:37 a.m.) September 11, 2001). [Firehouse, 1/31/2003] He then told people at the command post they should “be prepared to be hit again.” [Project Rebirth, 6/30/2002 pdf file] However, he now hears over his radio that “the third plane was no longer inbound, that it had crashed.” This news “gave us a sigh of relief,” he will later comment. [Firehouse, 1/31/2003] The identity of this third suspicious plane is unclear. Brown will say it turned out to be “the one that crashed in Pennsylvania,” meaning Flight 93. [Project Rebirth, 6/30/2002 pdf file] However, this is apparently impossible, since Brown will describe hearing it has crashed before 9:59 a.m., when the South Tower collapses (see 9:59 a.m. September 11, 2001), but Flight 93 will reportedly crash later on, at 10:03 a.m. (see (10:03 a.m.-10:10 a.m.) September 11, 2001 and (10:06 a.m.) September 11, 2001). [Firehouse, 1/31/2003; 9/11 Commission, 7/24/2004, pp. 30]

Entity Tags: Timothy Brown

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

A man who is on the 105th floor of the South Tower calls emergency 9-1-1 to report that floors below his location, “in the 90-something floor,” have collapsed. The 9-1-1 operator types a record of this call into the Special Police Radio Inquiry Network (SPRINT) data link, which will be passed on to the New York fire department’s Emergency Medical Service (EMS). It isn’t known when the call is made exactly, but the EMS Dispatch computer apparently receives the call record at this time. However, because it is classified as a “supplement message,” it is not yet read by anyone. The police dispatcher dealing with the area around the WTC also receives the call record, but misinterprets it as meaning that the floor the person is on has collapsed. EMS dispatchers are dealing with an enormous volume of calls as well as performing many other tasks under extreme pressure during the crisis, so a report later concludes that the EMS operators didn’t have the time to review the information before the collapse of the South Tower at 9:59 (see 9:59 a.m. September 11, 2001), and the fire chiefs never received the information. [New York City Fire Department, 8/19/2002]

Entity Tags: World Trade Center

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

Joseph Morris.Joseph Morris. [Source: Publicity photo]Inspector Joseph Morris, a commanding officer with the Port Authority Police Department (PAPD), tells numerous PAPD officers to initially stay away from the Twin Towers after they arrive near the World Trade Center, thereby likely preventing many of them from being killed when the South Tower collapses. [Police, 9/1/2002; Law Officer, 8/16/2011] Morris was in his office at New York’s La Guardia Airport when he heard someone yell out that an aircraft had crashed into the WTC. After turning on the television and seeing the images of the burning North Tower, he gave the order for all his available officers to go to the WTC. “I initiated a mobilization of personnel following long-held department plans and procedures for response to the World Trade Center for aircraft disasters and high-rise fires,” he will later describe. Morris and 17 colleagues head out and arrive in the vicinity of the WTC “maybe six to seven minutes” before the South Tower collapses, Morris will estimate, which would be at around 9:52 a.m. to 9:53 a.m. About 40 to 50 PAPD officers are at the location at this time and Morris is the highest-ranking commander among them. [Urban Hazards Forum, 1/2002; 9/11 Commission, 11/10/2003; 9/11 Commission, 5/18/2004 pdf file]
Officers Are Told to Stay Away from the WTC - The PAPD officers with Morris are keen to rush into the Twin Towers and get involved with the rescue operation. Normally, they would go to the lobby of the North Tower in an emergency like the current one. Morris, though, tells them to stay back while he assesses the situation. The decision is made for the officers to “break up into groups of three or four, with a supervisor,” and “get [their] bunker gear on,” Morris will say. He instructs them “not to go anywhere until I came up with a plan.” [Urban Hazards Forum, 1/2002; Police, 9/1/2002; Law Officer, 8/16/2011]
Commander Thinks There May Be Few People Left to Rescue - Morris will say his caution about allowing PAPD officers into the Twin Towers at the current time is partly because he sees very few civilians coming his way up West Street and this leads him to question how many people are left at the WTC to be rescued. [9/11 Commission, 11/10/2003] Some other Port Authority employees, in addition to the PAPD officers, are at the same location as Morris and Morris tells them, too, to stay away from the WTC. “I informed them they should stay at that location until more information was gathered for responses,” he will say. [9/11 Commission, 5/18/2004 pdf file]
Commander's Decision Likely Saves Lives - Morris’s decision to keep PAPD officers away from the WTC will be credited with saving the lives of people who may have been killed when the South Tower collapsed, at 9:59 a.m. (see 9:59 a.m. September 11, 2001), if they had headed to the Twin Towers. Alan Reiss, director of the Port Authority’s World Trade Department, will say that in retrospect, he believes it “most certainly saved lives of at least some of those officers held back.” [9/11 Commission, 11/3/2003] Law Officer magazine will describe it as a decision “that proved to be a lifesaver for many.” [Law Officer, 8/16/2011] Police magazine will call it one of “a couple of key decisions” Morris makes “that saved his department even greater tragedy” today. [Police, 9/1/2002] A few minutes after arriving near the WTC, Morris will decide to head to the incident command post in the North Tower to meet with other professionals who are assembled there. He will be going toward it with Lieutenant Emiliano Sepulveda, a colleague of his, when the South Tower starts to come down. He will run north up West Street and then find protection inside the PAPD’s command bus. [9/11 Commission, 11/10/2003; 9/11 Commission, 5/18/2004 pdf file; Law Officer, 8/16/2011]

Entity Tags: Emiliano Sepulveda, Joseph M. Morris, Alan Reiss, Port Authority Police Department

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Members of New York Police Department’s elite Emergency Service Unit (ESU) are given an order that means they have to get out of the World Trade Center or delay entering it and consequently many of them will avoid being killed when the South Tower collapses, at 9:59 a.m. [Keegan and Davis, 2006, pp. 101-102; Appel, 2009, pp. 112-113] The ESU is a highly trained organization comprised of first response rescuers. [City of New York, 6/29/2002] Its members respond to situations that require the most specialized training, such as hostage taking and water rescue, and use the most advanced equipment. [Keegan and Davis, 2006, pp. 101]
Officers Are Ordered to Come Down from the WTC - Inspector Ronald Wasson, commanding officer of the ESU, earlier on divided his officers into four teams of five or six men and then sent two teams into each of the Twin Towers to assist the rescue operation. [New York Daily News, 11/11/2001] But now, ESU commanders give the order for the unit’s members to “go tactical.” This means the officers in the towers have to come out of the buildings and go to the unit’s SWAT (special weapons and tactics) vans; put on their BDU (battle dress uniform) suits, flak jackets, and Kevlar helmets; and arm themselves with heavy weapons and assault rifles.
Commander Thinks Terrorists Might Attack the First Responders - The decision to order ESU officers to go tactical is made by Wasson, according to a book by Lieutenant William Keegan of the Port Authority Police Department. [Keegan and Davis, 2006, pp. 101-102] Wasson is currently assembled with a number of other ESU officers outside the Twin Towers, at the corner of West and Vesey Streets. [Appel, 2009, pp. 68] He decides that ESU officers should go tactical due to his concern that armed terrorists might attack the first responders at the WTC. He is “worried that with all his personnel inside the buildings, he [has] no way to protect the cops, firefighters, or civilians from the kind of low-intensity warfare—snipers, automatic weapons, car bombs, hostage situations—he [is] sure [will] follow the attack,” Keegan will write. He believes it is the responsibility of the New York Fire Department to deal with the fires in the Twin Towers, while the Police Department should be preparing for what might happen next. Many ESU members will come out of the towers after receiving the order to go tactical, according to Keegan. [Keegan and Davis, 2006, pp. 101-102]
Order Is Given after an Officer Hears of the Pentagon Attack - However, according to author Anthea Appel, the order to go tactical is made by Sergeant Tom Sullivan, another ESU officer. Sullivan is currently at the corner of West and Vesey Streets along with Wasson, getting ready to take two teams into the WTC. At 9:56 a.m., after hearing over his radio about the attack on the Pentagon, which occurred at 9:37 a.m. (see 9:37 a.m. September 11, 2001), he exclaims, “Screw rescue!” He then pulls his men back and announces that all ESU teams will be “going in tactical,” according to Appel. “I want heavy vests, helmets, rifles, and machine guns,” he says. In response to his announcement, ESU officers start taking off their rescue gear and putting on combat gear. They take off their safety helmets and replace them with ballistic helmets. They take off their air tanks, unbuckle their Roco harnesses, and put on more body armor over their bulletproof vests. They also unlock their gun bins and take out shotguns, submachine guns, and assault rifles. Some officers grumble under their breath, annoyed at being held back. “They didn’t like wasting time fiddling around with equipment,” Appel will comment, “and this sudden switch interrupted their adrenaline momentum.” They will be in the middle of changing into their combat gear when the South Tower collapses (see 9:59 a.m. September 11, 2001). [Appel, 2009, pp. 112-113]
Order Is Wrong but Saves Lives - The order to go tactical will turn out to be mistaken as there are no attacks by armed terrorists on the first responders at the WTC. However, as a result of it being issued, numerous ESU members will be outside the Twin Towers instead of inside the buildings when the South Tower comes down and many of them will therefore avoid being killed in the collapse. While 14 ESU members will die in the WTC collapses, a far greater number will survive, Keegan will write, “because Wasson’s order pulled them out of the towers and saved their lives.” [Keegan and Davis, 2006, pp. 102] One ESU member, Detective Frank DeMasi, will conclude that Sullivan “definitely saved his life when he made that last-minute decision to switch from rescue to tactical mode,” according to Appel, since the delay while they changed into their combat gear “kept DeMasi and his teammates from walking into the South Tower before it collapsed.” [Appel, 2009, pp. 265-266]

Entity Tags: New York City Police Department, Ronald Wasson, Frank DeMasi, Tom Sullivan

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

James Nieckarz.James Nieckarz. [Source: Maryknoll Mission Archives]Police officers order members of the public to get away from the World Trade Center, telling them the Twin Towers are in danger of collapsing. Shanthy Nambiar, a reporter for BridgeNews in New York, is standing on Vesey Street, beneath Building 7 of the WTC. She hears someone shout, “You guys shouldn’t be in this area.” She will later recall, “Police officers ordered people to start fleeing the area, saying the towers were in danger of collapse.” She runs north one block and then sees the South Tower coming down (see 9:59 a.m. September 11, 2001). [Casey, 2001, pp. 156] Priest Father James Nieckarz is also standing outside Building 7 around this time. He will recall that a couple of police officers come along, shouting out to everyone on the street: “Everyone run to the north. The tower is shaking and may come down.” Nieckarz goes around Building 7 and then, as he is walking north, hears “a loud rumbling roar” behind him as the South Tower collapses. [Salon, 9/12/2001; United States Conference of Catholic Bishops, 9/2003, pp. 15] Why the police officers encountered by Nambiar and Nieckarz believe the Twin Towers are in danger of collapsing is unclear. Although a New York City Police Department (NYPD) helicopter has reported “large pieces” falling from the South Tower (see (9:49 a.m.) September 11, 2001), the 9/11 Commission Report will state, “Prior to 9:59, no NYPD helicopter pilot predicted that either tower would collapse.” [9/11 Commission, 7/24/2004, pp. 304]

Entity Tags: Shanthy Nambiar, James Nieckarz, New York City Police Department

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The South Tower of the World Trade Center collapses.The South Tower of the World Trade Center collapses. [Source: Associated Press]The South Tower of the World Trade Center tilts to the southeast and then collapses. It was hit by Flight 175 at 9:03 a.m., 56 minutes earlier (see 9:03 a.m. September 11, 2001). [Washington Post, 9/12/2001; New York Times, 9/12/2001; MSNBC, 9/22/2001; USA Today, 12/20/2001; Associated Press, 8/21/2002; ABC News, 9/11/2002; National Institute of Standards and Technology, 9/2005, pp. 44] The first sign of the collapse is visible on floor 82. [National Institute of Standards and Technology, 9/2005, pp. 87] The angle of the tilt will be disputed after 9/11 (see September-November 2005), as will the time it takes the towers to fall to the ground (see September 12, 2001-September 2005). [Scientific American, 10/9/2001; Eagar and Musso, 12/2001; PBS Nova, 5/2002; National Institute of Standards and Technology, 8/30/2006]

Entity Tags: World Trade Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Steve Lanoce.Steve Lanoce. [Source: Gamezebo]A group of police officers tries to enter World Trade Center Building 7 in order to get out of the WTC plaza, but they find the door is locked and the building is on fire. The seven officers are members of New York Police Department’s Emergency Service Unit (ESU). They were about 60 yards north of the South Tower when it collapsed, at 9:59 a.m. (see 9:59 a.m. September 11, 2001). When the dust began to clear, they made their way to the WTC plaza. But as they then tried to get out of the plaza, they found that every corner they ran to was blocked.
Officers Find the Door to WTC 7 Is Locked - The ESU officers now notice the bridge that leads from the plaza to WTC 7, and wonder if they can get out of the plaza by entering WTC 7 and then making their way down to the street below. [Tactical Edge, 6/2002 pdf file; Appel, 2009, pp. 99-100] WTC 7, a 47-story office building, is located to the north of the Twin Towers. It is linked to the main WTC complex by a glass-enclosed pedestrian bridge at the third-floor level. [Federal Emergency Management Agency, 5/1/2002, pp. 5-2; National Institute of Standards and Technology, 11/2008, pp. 2] The officers walk across the bridge, but when they reach the door that leads into WTC 7 they find it is locked. “Why anyone would lock a door under these circumstances was anybody’s guess,” author Anthea Appel will later comment.
Officers Find WTC 7 Is on Fire - One officer, Steve Lanoce, decides to try to break the door. He takes out his handgun and fires a shot at the bottom glass pane of the door. The glass, however, turns out to be bullet-proof and cracks but does not break. Furthermore, Lanoce’s shot sets off the burglar alarm in WTC 7. Fortunately, Lanoce’s colleagues are able to kick in the cracked glass and create an opening large enough to crawl through. They find, though, that the building on the other side of the door is on fire and they have to jump back to avoid the flames. [Tactical Edge, 6/2002 pdf file; Appel, 2009, pp. 99-100]
WTC 7 Suffered Only Minor Damage When the South Tower Collapsed - The cause of the fire in WTC 7 is unclear. The National Institute of Standards and Technology, which will investigate the collapse of WTC 7 that occurs later today (see (5:20 p.m.) September 11, 2001), will state that the building suffered only minor damage when the South Tower collapsed. “A few windows on lower floors of the south face of WTC 7 were broken, and dust and small debris were deposited in the third-floor lobby,” it will describe. However, it will add, “None of the large pieces of debris from [the South Tower] hit WTC 7 because of the large distance between the two buildings and there was no evidence of structural damage to WTC 7.” [National Institute of Standards and Technology, 11/2008, pp. 16] The ESU officers then notice a stream of people making their way out of the North Tower. They therefore abandon their plan to get out of the WTC complex and instead go to help evacuate the civilians from the tower. [Tactical Edge, 6/2002 pdf file; Appel, 2009, pp. 101]

Entity Tags: Steve Lanoce, World Trade Center, New York City Police Department

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Damage to the southwest corner of WTC 7.Damage to the southwest corner of WTC 7. [Source: Arquelio Galarza]World Trade Center Building 7 (WTC 7) suffers some damage, caused by debris from the collapse of the north WTC tower, according to later official reports. [Federal Emergency Management Agency, 5/1/2002, pp. 5-16; National Institute of Standards and Technology, 11/2008, pp. 16]
WTC 7 Undamaged by South Tower Collapse - WTC 7 is a 47-story office building located 370 feet north of the North Tower (WTC 1). In the final report of its investigation into WTC 7’s collapse, published in November 2008 (see November 20, 2008), the National Institute of Standards and Technology (NIST) will state that although a few windows on the lower floors of WTC 7’s south face were broken when the South Tower (WTC 2) collapsed at 9:59 a.m. (see 9:59 a.m. September 11, 2001), “None of the large pieces of debris from WTC 2 hit WTC 7, because of the large distance between the two buildings,” and there is “no evidence of structural damage to WTC 7” as a result of the South Tower’s collapse.
Debris Reportedly Damages Exterior Columns - However, when the North Tower collapses (see 10:28 a.m. September 11, 2001), some fragments of debris are “forcibly ejected” from it, and travel “distances up to hundreds of meters.” According to NIST, pieces of this debris “hit WTC 7, severing six columns on floors 7 through 17 on the south face and one column on the west face near the southwest corner.” NIST will add that the debris also causes “structural damage between floor 44 and the roof,” and breaks a large number of windows on WTC 7’s south face.
Building Core Undamaged - However, NIST will state, based on “photographic evidence, witness accounts, and engineering judgment, it is likely that the structural damage (steel and floor slabs) did not penetrate beyond the perimeter of the building core. At the southwest corner, the structural damage extended only about one-third of the distance from the exterior wall to the building core.” NIST will comment, “Compared to the airplane impact damage to the WTC towers, there was relatively little damage to the interior of WTC 7.” There is also “no superficial or structural damage” to WTC 7’s north and east faces. And the sprayed fire resistive material that has been applied to the building’s steel columns, girders, and beams is only damaged in the “immediate vicinity of the WTC 1 debris impact.” NIST will admit, however, that there are “uncertainties” in its accounting of the events leading up to the collapse of WTC 7, because “the remains of all the WTC buildings were disposed of before Congressional action and funding was available for [its] investigation [of the WTC collapses] to begin” (see Shortly After September 11, 2001 and September 12-October 2001). [National Institute of Standards and Technology, 8/21/2008; National Institute of Standards and Technology, 11/2008, pp. 15-16]
FEMA Describes WTC 7 Damage - According to an earlier report on the collapse of WTC 7, published by the Federal Emergency Management Agency (FEMA) in May 2002 (see May 1, 2002), at that time, the “extent and severity of the resulting damage to WTC 7” when the North Tower collapses “are currently unknown.” But based on “photographic evidence and eyewitness accounts,” it is “assumed that the south side of the building was damaged to some degree.” FEMA’s report will state: “It does not appear that the collapse of WTC 1 affected the roof, or the east, west, and north elevations of WTC 7 in any significant way. However, there was damage to the southwest corner of WTC 7 at approximately floors 8 to 20, 24, 25, and 39 to 46.” The report will add: “According to firefighters’ eyewitness accounts from outside of the building, approximately floors 8-18 were damaged to some degree. Other eyewitness accounts relate that there was additional damage to the south elevation.” [Federal Emergency Management Agency, 5/1/2002, pp. 5-16, 5-20]
Structural Damage Not Responsible for Collapse - WTC 7 will collapse at 5:20 p.m. this afternoon (see (5:20 p.m.) September 11, 2001). [National Institute of Standards and Technology, 8/21/2008] However, NIST will conclude that the structural damage the building suffers plays no role in causing it to come down. NIST will state, “Other than initiating the fires in WTC 7, the damage from the debris from WTC 1 had little effect on initiating the collapse of WTC 7.” [National Institute of Standards and Technology, 11/2008, pp. xxxvii] WTC 7 suffers fires on some floors, which are reportedly initiated by debris from the collapse of the North Tower (see (10:28 a.m.-5:20 p.m.) September 11, 2001). According to NIST, it is these fires, “rather than the structural damage that resulted from the impacts” of debris, which “initiated the building’s collapse.” [National Institute of Standards and Technology, 8/21/2008]

Entity Tags: World Trade Center, National Institute of Standards and Technology, Federal Emergency Management Agency

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

FBI agents in New York quickly set up a temporary field office in an FBI parking garage, where they will be based for the next few weeks, after the attacks on the World Trade Center rendered their original office unusable. The New York office is the FBI’s largest field office, comprising some 1,100 special agents. It is located at 26 Federal Plaza, just a few blocks away from the WTC site. However, the collapses of the Twin Towers (see 9:59 a.m. September 11, 2001 and 10:28 a.m. September 11, 2001) disabled its telephone service, thereby rendering it useless. Officials are also concerned that 26 Federal Plaza might be the target of another terrorist attack.
New Facility Is Set Up in 24 Hours - Therefore, “Almost immediately” after the Twin Towers came down, according to the New York Times, the FBI starts relocating to a garage in Manhattan. The block-long, multilevel garage at 26th Street and the West Side Highway is usually used by the FBI to store and repair its fleet of vehicles. But within 24 hours of the attacks on the WTC, a temporary field office is up and running there. The facility is equipped with about 100 laptop computers. Three hundred phone lines are installed, with phones hooked up to a satellite truck positioned outside the garage.
Investigation Is Coordinated from the Temporary Facility - Officials from over two dozen federal, state, and local agencies are then based at the makeshift facility. Barry Mawn, director of the FBI’s New York office, and key federal prosecutors, including Mary Jo White, US Attorney for the Southern District of New York, coordinate the work of almost 2,000 investigators from there. The garage will serve as the command center for the first four weeks of the FBI’s investigation of the terrorist attacks. [New York Times, 9/24/2001; Washington Post, 10/20/2001; Kessler, 2002, pp. 5, 424; Journal of Public Inquiry, 3/2002 pdf file] It will be “New York’s nerve center for information about the attacks,” according to the Associated Press. [Associated Press, 9/27/2001] Agents will move back to their original field office at 26 Federal Plaza early in October. [Washington Post, 10/20/2001]

Entity Tags: FBI New York Field Office, Barry Mawn, Federal Bureau of Investigation, Mary Jo White

Timeline Tags: Complete 911 Timeline

Allan Dodds Frank.Allan Dodds Frank. [Source: CNN]A CNN correspondent incorrectly suggests that a third skyscraper may have recently collapsed in New York. Reporting from Lower Manhattan, Allan Dodds Frank describes: “[J]ust two or three minutes ago there was yet another collapse or explosion. I’m now out of sight, a Good Samaritan has taken me in on Duane Street. But at a quarter to 11, there was another collapse or explosion following the 10:30 collapse of the second tower. And a firefighter who rushed by us estimated that 50 stories went down. The street filled with smoke. It was like a forest fire roaring down a canyon.” [CNN, 9/11/2001] A third tower—the 47-story World Trade Center Building 7—does collapse on this day. It will not come down, however, until 5:20 in the afternoon (see (5:20 p.m.) September 11, 2001). [Washington Post, 9/12/2001; New York Times, 11/29/2001]

Entity Tags: Allan Dodds Frank

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

At around 8:00 p.m., Afghanistan time (11:30 a.m., New York time), Taliban leader Mullah Omar allegedly says, “Things have gone much further than expected.” This is according to what the New Yorker will describe as “Afghan intelligence sources” who monitor the call. (It is unclear what “Afghan intelligence sources” means, since the Taliban control nearly all of Afghanistan at this time, but it could be a reference to Northern Alliance forces; the CIA gave them equipment to monitor the Taliban (see Winter 1999-March 2000).) Omar’s comment takes place over an hour after one of the World Trade Center towers collapsed, which means thousands have been killed in the attacks, not hundreds (see 9:59 a.m. September 11, 2001). An Afghan intelligence official will later say: “They were expecting a reaction. But they thought it would be a Clinton-type reaction. They didn’t anticipate the kind of revenge that occurred.” [New Yorker, 6/10/2002] The “Clinton-type reaction” presumably is a reference to the August 1998 missile strikes on Sudan and Afghanistan during the Clinton administration (see August 20, 1998).

Entity Tags: Mullah Omar

Timeline Tags: Complete 911 Timeline, 9/11 Timeline, War in Afghanistan

Jeffrey Scott Shapiro.Jeffrey Scott Shapiro. [Source: University of Florida]Larry Silverstein, who recently took over the lease of the World Trade Center complex (see July 24, 2001), discusses possibly bringing down WTC Building 7 in a controlled demolition in a telephone conversation with his insurance carrier, according to a reporter who is at the WTC site this afternoon. [Fox News, 4/22/2010] WTC 7 is a 47-story office building located just north of the Twin Towers. The National Institute of Standards and Technology (NIST) will say it suffered some structural damage (see 10:28 a.m. September 11, 2001) when the North Tower collapsed (see 10:28 a.m. September 11, 2001) and it has fires on several floors (see (10:28 a.m.-5:20 p.m.) September 11, 2001). It will collapse at 5:20 p.m., apparently becoming the first tall building ever to come down primarily as a result of fire (see (5:20 p.m.) September 11, 2001). [National Institute of Standards and Technology, 11/2008, pp. xxxv-xxxvi]
Silverstein Allegedly Wants WTC 7 Demolished - Investigative reporter Jeffrey Scott Shapiro, who is at the scene of the attacks in New York, will later recall: “Shortly before [WTC 7] collapsed, several NYPD officers and Con Edison workers told me that Larry Silverstein… was on the phone with his insurance carrier to see if they would authorize the controlled demolition of the building, since its foundation was already unstable and expected to fall. A controlled demolition would have minimized the damage caused by the building’s imminent collapse and potentially save lives.” Shapiro will add: “Many law enforcement personnel, firefighters, and other journalists were aware of this possible option. There was no secret.” [Fox News, 4/22/2010] Preparing a large building for demolition usually takes weeks, or even months. This time is spent on operations such as wrapping concrete columns to ensure pieces do not fly off. [Baltimore Sun, 2/26/1995; PBS NOVA, 12/1996; Construction Equipment Guide, 2/24/2005]
Discussion of Demolition Later Denied - Silverstein will later recall discussing WTC 7 over the phone with the commander of the New York Fire Department, and telling him, “We’ve had such terrible loss of life, maybe the smartest thing to do is pull it” (see After 12:00 Noon September 11, 2001), but a spokesman will subsequently claim that Silverstein was referring to withdrawing firefighters from the building, not bringing WTC 7 down with explosives. [US Department of State, 9/16/2005; BBC, 7/4/2008] At the end of a three-year investigation into the building’s collapse, NIST will say WTC 7 “did not collapse from explosives,” but critics will dispute this conclusion (see August 21, 2008). [Associated Press, 8/21/2008; New York Times, 8/21/2008]

Entity Tags: Jeffrey Scott Shapiro, New York City Police Department, Con Edison, World Trade Center, Larry Silverstein

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

At some point during the afternoon of 9/11, WTC leaseholder Larry Silverstein receives a phone call from the Fire Department commander, where they discuss the state of Building 7 of the WTC complex. Silverstein will discuss this call in a PBS documentary broadcast in 2002, saying that he told the commander, “You know, we’ve had such terrible loss of life, maybe the smartest thing to do is pull it. And they made that decision to pull and then we watched the building collapse.” [PBS, 9/10/2002] Some people suggest that by “pull it” Silverstein meant the deliberate demolition of the building. But a spokesman for Silverstein states that he was expressing “his view that the most important thing was to protect the safety of those firefighters, including, if necessary, to have them withdraw from the building.” [US Department of State, 9/16/2005] Yet this claim is contradicted by some accounts, according to which firefighters decided early on not to attempt fighting the fires in WTC 7 (see After 10:28 a.m. September 11, 2001)(see (11:30 a.m.) September 11, 2001). According to Haaretz, “In the afternoon of September 11, the Fire Department informed him that the smaller 7 World Trade Center building, which he owned, was going to collapse.” [Ha'aretz, 11/21/2001] Building 7 eventually collapses at around 5:20 in the afternoon (see (5:20 p.m.) September 11, 2001).

Entity Tags: Larry Silverstein

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Richard Rotanz.Richard Rotanz. [Source: University of Delaware]Richard Rotanz, the deputy director of New York’s Office of Emergency Management, assesses the state of World Trade Center Building 7 and sees significant damage inside the building. [BBC, 7/6/2008; BBC, 10/17/2008] WTC 7 was damaged by the debris when the North Tower of the WTC collapsed at 10:28 a.m. (see 10:28 a.m. September 11, 2001). [National Institute of Standards and Technology, 11/2008, pp. 16] At around 12:30 p.m., according to the BBC, Rotanz and some other officials—whose identities are unstated—go into WTC 7 to see what condition the building is in. “At the time the building wasn’t safe, but we had to make an assessment just the same,” Rotanz will later tell the BBC. He will describe what he observes inside WTC 7, saying: “You could hear the building creak above us. You could hear things fall. You could hear the fire burning. You could see columns just hanging from the floors, gaping holes in the floors up above us.” He also sees “an elevator car that was blown out of its shaft” and is now “down the hall.” [BBC, 7/6/2008; BBC, 10/17/2008] The elevator car is “30 or 40 feet away from where the elevator shaft once was,” according to another account. [Aegis Insurance Services, Inc. v. 7 World Trade Center Company, LP, 12/4/2013 pdf file] Rotanz and those with him soon leave the building. “We didn’t spend that long” inside WTC 7, Rotanz will say. Rotanz has also observed significant damage to the exterior of WTC 7 (see (After 10:28 a.m.) September 11, 2001). [BBC, 10/17/2008] At around 2:30 p.m., senior firefighters will make the decision to abandon the possibility of fighting the fires in WTC 7 (see (2:00 p.m.-2:30 p.m.) September 11, 2001). The building will collapse at around 5:20 p.m. (see (5:20 p.m.) September 11, 2001). [National Institute of Standards and Technology, 9/2005, pp. 111]

Entity Tags: Richard Rotanz, World Trade Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The chief fire officer who has been assigned to take charge of operations at WTC Building 7 meets with his command officer, to discuss the condition of this building and the fire department’s capabilities for controlling the fires in it. A deputy fire chief who has just been in WTC 7, inspecting up to its 7th or 8th floor, reports that there was a lot of fire inside and the stairway was filling with smoke. The fire chiefs discuss the situation and identify the following conditions:
bullet WTC 7 has suffered damage caused by falling debris from the Twin Towers, and they are uncertain about its structural stability.
bullet There are large fires on at least six floors.
bullet They do not have enough equipment available for conducting operations in the building, such as hoses, standpipe kits, and handie-talkies.
bullet There is no water immediately available for fighting the fires. (However, this concern is apparently contradicted by reports that two or three fireboats are moored nearby, specifically to provide water-pumping capacity for the WTC site.)
Therefore, at around 2:30 p.m., fire officers decide to completely abandon WTC 7 and a final order is given to evacuate the site. Firefighters and other emergency workers will be withdrawn from the surrounding area (see (4:30 p.m.) September 11, 2001), and Building 7 collapses later in the afternoon (see (5:20 p.m.) September 11, 2001). [Firehouse (.com), 9/17/2001; National Institute of Standards and Technology, 9/2005, pp. 110-111]

Entity Tags: New York City Fire Department, World Trade Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Building 7 of the World Trade Center, located across the street from the Twin Towers, caught fire after the initial attacks on the WTC. [CNN, 9/12/2001] By 4:10 in the afternoon, CNN had reported it being on fire (see 4:10 p.m. September 11, 2001). Subsequently it is reported that WTC 7 is in danger of collapsing or may have already collapsed. At around 4:15 p.m., CNN reports, “We’re getting information that one of the other buildings… Building 7… is on fire and has either collapsed or is collapsing… now we’re told there is a fire there and that the building may collapse as well.” About 12 minutes later, BBC reporter Greg Barrow, who is in New York, appears on the BBC radio channel Five Live and says, “We are hearing reports from local media that another building may have caught light and is in danger of collapse.” He adds, “I’m not sure if it has yet collapsed but the report we have is talking about Building 7.” Around this time, the area around Building 7 is being evacuated, apparently because senior firefighters have determined it is in danger of collapsing (see (4:30 p.m.) September 11, 2001). At 4:53, based on the earlier reports, the Radio Five Live show’s presenter will incorrectly claim that Building 7 has already collapsed, saying, “Twenty-five minutes ago we had reports from Greg Barrow that another large building has collapsed just over an hour ago.” [BBC, 3/2/2007] Starting at 4:54, BBC television will also begin reporting that Building 7 has already collapsed (see 4:54 p.m.-5:10 p.m. September 11, 2001). In fact, it does not do so until 5:20 (see (5:20 p.m.) September 11, 2001).

Entity Tags: World Trade Center, CNN, British Broadcasting Corporation

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The BBC’s Jane Standley, reporting the collapse of WTC 7 while it is visible still standing behind her.The BBC’s Jane Standley, reporting the collapse of WTC 7 while it is visible still standing behind her. [Source: BBC]Several times, the BBC reports that Building 7 of the World Trade Center has collapsed, when it is in fact still standing. At 4:54 p.m., its domestic television news channel, BBC News 24, reports, “We’re now being told that yet another enormous building has collapsed… it is the 47-story Salomon Brothers building [i.e. WTC 7].” Three minutes later, its international channel, BBC World, reports, “We’ve got some news just coming in actually that the Salomon brothers building in New York right in the heart of Manhattan has also collapsed.” Then, at about 5:10 p.m., BBC World repeats the claim: “I was talking a few moments ago about the Salomon building collapsing and indeed it has… it seems this wasn’t the result of a new attack but because the building had been weakened during this morning’s attack.” Yet WTC 7 does not collapse until 5:20 p.m., over 25 minutes after the BBC first reported it (see (5:20 p.m.) September 11, 2001). The BBC’s live shot even shows the building still standing in the background, while its collapse is being reported. When these reports come to light early in 2007, Richard Porter, the head of news for BBC World, will suggest the error was due to the “confusing and chaotic situation on the ground” on 9/11. [BBC, 3/2/2007] Starting around 4:15 p.m., CNN and other news outlets had been reporting that WTC 7 was in danger of collapsing or may already have collapsed (see (4:15 p.m.-4:27 p.m.) September 11, 2001).

Entity Tags: World Trade Center, British Broadcasting Corporation

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

Steel beams from the WTC were already being removed and recycled on September 20, 2001.Steel beams from the WTC were already being removed and recycled on September 20, 2001. [Source: Associated Press]In the month following 9/11, a significant amount of the steel debris from the WTC collapses is removed from the rubble pile, cut into smaller sections, and either melted at a recycling plant or shipped out of the US. [US Congress, 3/6/2002] Each of the Twin Towers contained 78,000 tons of recyclable steel. Much of this is shipped to India, China, and other Asian countries, where it will be melted down and reprocessed into new steel products. Asian companies are able to purchase the steel for just $120 per ton, compared, for example, to a usual average price of $150 per ton in China. Industry officials estimate that selling off the steel and other metals from the WTC for recycling could net a few tens of million dollars. [New York Times, 10/9/2001; Reuters, 1/21/2002; Reuters, 1/22/2002; Eastday, 1/24/2002; CorpWatch, 2/6/2002] 9/11 victims’ families and some engineers are angered at the decision to quickly discard the steel, believing it should be examined to help determine how the towers collapsed. A respected fire fighting trade magazine comments, “We are literally treating the steel removed from the site like garbage, not like crucial fire scene evidence.” [Fire Engineering, 1/2002] Rep. Joseph Crowley (D-NY) will later call the loss of this evidence “borderline criminal.” By March 2002, 150 pieces of steel from the WTC debris will have been identified by engineers for use in future investigations (see March 6, 2002). [Federal Emergency Management Agency, 5/1/2002, pp. D-13] A study by the National Institute of Standards and Technology (NIST), which commences in August 2002 [National Institute of Standards and Technology, 8/21/2002; Associated Press, 8/21/2002] , will have 236 pieces of recovered steel available to it. Of these, 229 pieces are from WTC 1 and 2, representing “roughly 0.25 percent to 0.5 percent of the 200,000 tons of structural steel used in the construction of the two towers.” [National Institute of Standards and Technology, 9/2005, pp. 85 pdf file] New York Mayor Mike Bloomberg defends the decision to quickly get rid of the WTC steel, saying, “If you want to take a look at the construction methods and the design, that’s in this day and age what computers do. Just looking at a piece of metal generally doesn’t tell you anything.” Officials in the mayor’s office decline to reply to requests by the New York Times regarding who decided to have the steel recycled. [New York Times, 12/25/2001; Eastday, 1/24/2002]

Entity Tags: Joseph Crowley, World Trade Center, Michael R. Bloomberg

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

E Team crisis management software.E Team crisis management software. [Source: Police Magazine]New York City’s Office of Emergency Management (OEM) is much aided in its recovery efforts at Ground Zero when it starts using a little-known piece of emergency management software, which it only purchased last month and that was originally going to be launched on September 17. [Wall Street Journal, 10/23/2001; Wired News, 11/2/2001] The software, called E Team, helps organizations to “prepare for, respond to, and recover from disasters and emergencies of all types.” [California Technology Ventures, 10/16/2001] It was created by E Team Inc., a company based in Canoga Park, California. [e-ProWire, 5/22/2002] The New York City OEM only bought E Team in August (see August 2001). It installed the software on computers in its Emergency Operations Center in World Trade Center Building 7 (WTC 7) and intended to launch the system on September 17. [Wall Street Journal, 10/23/2001; Wired News, 11/2/2001]
Engineers Put Together New System to Manage Recovery Operation - The OEM was in contact with E Team Inc. executives within a few hours of the attacks on the WTC on September 11. [Wall Street Journal, 10/23/2001; e-ProWire, 5/22/2002] E Team Inc. employees reportedly suspected in advance that WTC 7—which housed the computers on which their software was installed—would collapse. Matt Walton, the company’s CEO, will later recall: “We knew that tower number 7 was probably not going to make it. We contacted the [New York City] mayor’s office and told them we would put up the New York databases on our own servers.” [Wired News, 11/2/2001] That night, a group of E Team Inc. engineers gathered at the company’s headquarters in Canoga Park, and put together a system on the company’s servers using data that the New York City OEM had sent to the company to prepare for the launch of the E Team system on September 17. By September 12, the engineers had the system ready for use. [Wall Street Journal, 10/23/2001]
System Goes into Operation at New Command Center - For the first couple of days after 9/11, the OEM had to coordinate its recovery efforts on paper or using e-mail, because its emergency management computer systems were destroyed when WTC 7 collapsed on the afternoon of September 11 (see (5:20 p.m.) September 11, 2001). An OEM spokesman will comment, “It became apparent that we needed very sophisticated technology to effectively handle the crisis.” [Wired News, 11/2/2001] Then, on September 14, the E Team system goes into operation at the OEM’s temporary command center at Pier 92 on the Hudson River, where several server computers have been set up to run the software and 200 workstations are connected to the system. [Wall Street Journal, 10/23/2001; e-ProWire, 5/22/2002] Troy Armstrong and John Hughes, two senior E Team Inc. employees who are distinguished emergency management professionals, are installed at the temporary command center. They are supplemented with three additional E Team Inc. employees.
System Plays Key Role in Recovery Operation - The main initial uses of E Team in response to the 9/11 attacks are resource management and situation reporting, but over time the system will also be used for incident reporting, asset tracking, action planning, and logistics. [California Technology Ventures, 10/16/2001] E Team tracks everything related to the recovery efforts at Ground Zero. It enables emergency responders to monitor the location of fires, personnel, supplies, and trucks. It also handles resource requests. [Wired News, 11/2/2001; e-ProWire, 5/22/2002] It makes the recovery operation “much more efficient,” according to Lieutenant Colonel John Flanagan of the New York Army National Guard. [Wall Street Journal, 10/23/2001] In total, more than 1,700 individuals from over 200 organizations will use the E Team system at the height of the rescue and recovery efforts. [Council of the City of New York, 8/2002, pp. 22 pdf file]

Entity Tags: John Hughes, E Team Inc., Matt Walton, John Flanagan, Troy Armstrong, Office of Emergency Management

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The New York Police and FBI are investigating the theft of over 250 tons of steel from the remains of the collapsed WTC towers. Apparently, the steel was hauled away by trucks involved in the official clear-up operation (see September 12-October 2001), but instead of being taken to Fresh Kills—the FBI-controlled dump on Staten Island where it was intended to go—the steel was driven to three independently-owned scrapyards, two in New Jersey and one on Long Island. The London Telegraph says the scrap metal value of the stolen steel would have been roughly $17,500. Investigators believe the theft was organized by one of New York’s Mafia families. [Daily Telegraph, 9/29/2001] Consequently, on November 26, 2001, the city initiates use of an in-vehicle Global Positioning System (GPS), to monitor the locations of nearly 200 trucks removing steel from the WTC collapse site, at a cost of $1,000 per unit. This system sends out alerts if any truck travels off course or arrives late at its destination. One driver involved with the clear-up operation is subsequently dismissed simply for taking an extended lunch break. [Access Control and Security Systems, 7/2002]

Entity Tags: World Trade Center, New York City Police Department, Federal Bureau of Investigation

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

A sample of WTC steel eroded and corroded due to eutectic formations.A sample of WTC steel eroded and corroded due to eutectic formations. [Source: FEMA]The Journal of the Minerals, Metals and Materials Society (JOM) reports that the examination of a beam from the remains of WTC Building 7—which collapsed late in the afternoon of 9/11 (see (5:20 p.m.) September 11, 2001)—has revealed “unexpected erosion” of the steel. The article states: “The formation of the eutectic mixture of iron oxide and iron sulfide lowers the temperature at which liquid can form in this steel. This strongly suggests that the temperatures in this region of the steel beam approached around 1,000°C, forming the eutectic liquid by a process similar to making a ‘blacksmith’s weld’ in a hand forge.” [Barnett, Biederman, and Sisson, 12/2001] The New York Times will call this “perhaps the deepest mystery uncovered in the investigation.” [New York Times, 2/2/2002] FEMA’s World Trade Center Building Performance Study, released in May 2002 (see May 1, 2002), will add that the same “unusual erosion patterns” have been observed in a sample of the remaining structural steel from one of the Twin Towers. It will state, “This sulfur-rich liquid penetrated preferentially down grain boundaries of the steel, severely weakening the beam and making it susceptible to erosion.” FEMA is unable to explain this phenomenon, saying, “The severe corrosion and subsequent erosion… are a very unusual event. No clear explanation for the source of the sulfur has been identified.… It is possible that this is the result of long-term heating in the ground following the collapse of the buildings. It is also possible that the phenomenon started prior to collapse and accelerated the weakening of the steel structure.” [Federal Emergency Management Agency, 5/1/2002, pp. C-1 - C-13] Despite FEMA’s call for further research, the National Institute of Standards and Technology (NIST) will make no mention of the eutectic formations in its final report into the WTC collapses, released in late 2005, following its three-year investigation. [National Institute of Standards and Technology, 9/2005, pp. 13]

Entity Tags: National Institute of Standards and Technology, World Trade Center, Federal Emergency Management Agency

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

A New York Times article theorizes that diesel fuel tanks were responsible for the collapse of Building 7 of the WTC. It collapsed at 5:20 p.m. on 9/11, even though it was farther away from the Twin Towers than many other buildings that remained standing (see (5:20 p.m.) September 11, 2001). It was the first time a steel-reinforced high-rise in the US had ever collapsed in a fire. One of the fuel tanks had been installed in 1999 (see June 8, 1999) as part of a new “Command Center” for Mayor Rudolph Giuliani. [New York Times, 3/2/2002; Dow Jones Business News, 9/10/2002] However, in interviews, several Fire Department officers who were on the scene say they were not aware of any combustible liquid pool fires in WTC 7. [Fire Engineering, 9/2002] And, according to the National Institute of Standards and Technology (NIST), between 11:30 a.m. and 2:30 p.m. on 9/11, “No diesel smells [were] reported from the exterior, stairwells, or lobby areas” of WTC 7. [National Institute of Standards and Technology, 6/2004, pp. L-22] Curiously, given all the Wall Street scandals later in the year, Building 7 housed the SEC files related to numerous Wall Street investigations, as well as other federal investigative files. All the files for approximately 3,000 to 4,000 SEC cases were destroyed. Some were backed up in other places, but many were not, especially those classified as confidential. [New York Law Journal, 9/17/2001] Lost files include documents that could show the relationship between Citigroup and the WorldCom bankruptcy. [Street, 8/9/2002] The Equal Employment Opportunity Commission estimates over 10,000 cases will be affected. [New York Law Journal, 9/14/2001] The Secret Service had its largest field office, with more than 200 employees, in WTC 7 and also lost investigative files. Says one agent: “All the evidence that we stored at 7 World Trade, in all our cases, went down with the building.” [Tech TV, 7/23/2002] The IRS and Department of Defense were also tenants, along with the CIA, which, it has been revealed, had a secret office in Building 7. [CNN, 11/4/2001; New York Times, 11/4/2001; Federal Emergency Management Agency, 5/1/2002, pp. 5-2; New York Magazine, 3/20/2006] A few days later, the head of the WTC collapse investigation says he “would possibly consider examining” the collapse of Building 7, but by this time all the rubble has already been removed and destroyed. [US Congress, 3/6/2002]

Entity Tags: Larry Silverstein, Citibank, Internal Revenue Service, US Securities and Exchange Commission, Central Intelligence Agency, US Secret Service, WorldCom, World Trade Center, US Department of Defense

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The House Committee on Science holds a hearing on the investigation into the collapse of the World Trade Center on 9/11. Witnesses from industry, academia, and government testify on the collapses and the subsequent efforts to find out how and why they occurred. The hearings charter points out several problems that have severely hampered investigations. It says, “Early confusion over who was in charge of the [WTC collapse] site and the lack of authority of investigators to impound pieces of steel for examination before they were recycled led to the loss of important pieces of evidence that were destroyed early during the search and rescue effort.… Some of the critical pieces of steel—including the suspension trusses from the top of the towers and the internal support columns—were gone before the first BPAT [Building Performance Assessment Team] team member ever reached the site” (see September 12-October 2001). Furthermore, “The building owners, designers and insurers, prevented independent researchers from gaining access—and delayed the BPAT team in gaining access—to pertinent building documents largely because of liability concerns.” Regarding the decision to rapidly recycle the WTC steel, US Representative Joseph Crowley (D-NY) says, “I do believe that conspiracy theorists are going to have a field day with this,” and says this loss of important physical evidence “is not only unfortunate, it is borderline criminal.” In his statement before the committee, Glenn Corbett, a science professor at John Jay College, claims that the “lack of significant amounts of steel for examination will make it difficult, if not impossible, to make a definitive statement as to the cause and chronology of the collapse.” He also complains, “[W]e are staffing the BPAT with part-time engineers and scientists on a shoestring budget.” [US Congress, 3/6/2002; Associated Press, 3/7/2002]

Entity Tags: World Trade Center, Glenn Corbett, House Committee on Science, Joseph Crowley

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

FEMA’s World Trade Center Building Performance Study.FEMA’s World Trade Center Building Performance Study. [Source: FEMA]FEMA releases its report of the WTC collapses. It concludes, “[W]ith the information and time available, the sequence of events leading to the collapse of each tower could not be definitively determined.” On Building 7: “The specifics of the fires in WTC 7 and how they caused the building to collapse remain unknown at this time.” [Federal Emergency Management Agency, 5/1/2002]

Entity Tags: World Trade Center, Federal Emergency Management Agency

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

A brief ceremony marks the official ending of the cleanup and recovery effort at Ground Zero, eight months and 19 days after 9/11. As part of the ceremony, attended by thousands of people, a flatbed truck carries the last steel beam from the World Trade Center away from the site. The cleanup has been completed three months sooner than predicted and at a cost of $750 million. More than 108,000 truckloads of debris, comprising 1.8 million tons of steel and concrete, have been removed from the site. The debris was taken to the Fresh Kills landfill on Staten Island. Controversially, much of the steel was melted down or shipped out of the US for recycling (see September 12-October 2001). A small number of workers will remain at the site for a few more weeks, due to a delay by Deutsche Bank in letting firefighters search its high-rise at 130 Liberty Street. The final truckload of debris will be removed on June 24 and control of the site will be turned over to the New York Port Authority, which owns the land. Forensic investigators will continue sifting through debris at Fresh Kills, in the hope of finding and identifying more victims, until mid-July. [CBS News, 5/16/2002; CBS News, 5/30/2002; CNN, 5/30/2002; PBS, 5/30/2002; BBC, 7/15/2002; Glanz and Lipton, 2004, pp. 316-318; Stout, Vitchers, and Gray, 2006, pp. 219 and 226-227]

Entity Tags: World Trade Center

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

One of the key variables in the computer simulations used by the National Institute of Standards and Technology (NIST) (see (October 2002-October 2005)) to explain the WTC collapses is the speed of the aircraft that hit the towers. However, there is no consensus on how fast the planes were traveling. The first estimate was contained in an initial research paper by engineers Zdenek Bazant and Yong Zhou, who stated that the planes were traveling at 342 miles per hour. [Bazant and Zhou, 1/2002 pdf file] However, the Federal Emergency Management Agency (FEMA) and American Society of Civil Engineers (ASCE) report said that the plane that hit the North Tower was traveling at 470 miles per hour, whereas the plane that hit the South Tower was traveling at 590 miles per hour (see May 1, 2002). [Federal Emergency Management Agency, 5/1/2002, pp. 31] NIST initially estimates speeds of 435 miles per hour for the plane that hit the North Tower and 497 miles per hour for the plane that hit the South Tower. These estimates closely match figures produced by the Massachusetts Institute of Technology, which finds speeds of 429 miles per hour and 503 miles per hour for the two planes. However, NIST is dissatisfied with these results and does a second study, which finds speeds of 466 and 545 miles per hour. It then uses speeds of 472 and 570 miles per hour in its severe case model, on which its final report is based. In this model, the simulation of the planes traveling faster means greater damage to the towers’ structure, making them more unstable. [Kausel, 5/2002 pdf file; National Institute of Standards & Technology, 9/2005, pp. 152-165 pdf file; National Institute of Standards and Technology, 9/2005, pp. 109]

Entity Tags: Zdenek Bazant, National Institute of Standards and Technology, World Trade Center, Yong Zhou, Massachusetts Institute of Technology, American Society of Civil Engineers, Federal Emergency Management Agency

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Matthys Levy.Matthys Levy. [Source: PBS]A report is made publicly available, which the Engineering News-Record calls the “most comprehensive study yet on the destruction of the World Trade Center.” The study was commissioned by WTC leaseholder Silverstein Properties Inc. to support a $7 billion insurance claim, and conducted by a team of engineers from several leading firms, including Weidlinger Associates, LZA Technology/Thornton-Tomasetti, and ARUPFire. It is intended to build on a previous study sponsored by FEMA (see May 1, 2002). The report’s findings are based on an analysis of original structural drawings, thousands of photos, and dozens of videos. Investigators used fire evaluation techniques and powerful computer software to simulate the condition of each tower at critical times between the planes’ impacts and the towers’ collapses. The earlier FEMA investigators had no access to such computer modeling. Matthys Levy, the chairman of Weidlinger Associates and one of the engineers on the study team, says, “The buildings had tremendous reserve capacity and that was reflected in all of the elements we analyzed. In fact, because there were so much excess capacity, the columns even in the impact floors did not buckle immediately, but failed as the result of the fire.” The report states that failure of the WTC’s steel floor supports (“trusses”) did not contribute to the collapses. Instead, the collapses were caused by the failure of steel structural columns that were either destroyed when the planes hit or lost fireproofing, leaving them vulnerable to the weakening effects of the ensuing fires. It says that debris and dust distributed by the plane crashes inhibited the fires, such that the average air temperatures on the impact floors were between 400 and 700°C (750-1,300°F): significantly lower than those associated with typical “fully developed” office fires. However, says Matthys Levy, “By the time the temperature inside the buildings reached 400 degrees, the steel would have lost approximately 50% of its strength. Eventually, gravity took over and the towers began to fall.” Then, according to the analysis led by researchers from LZA Technology/Thornton-Tomasetti, “Once collapse initiated in each tower, essentially all of the interior structure of the tower fell straight down with floors pancaking on top of one another. The network of perimeter steel columns and spandrels acted like a chute to funnel the interior contents into the tower footprint.” According to the computer simulations, the damage to the South Tower’s steel core columns was so severe that the tower should have collapsed immediately after the plane hit. Civil engineer John Osteraas says this incorrect result casts doubt upon some of the study’s predictions. The report concludes that the collapse of the South Tower did not cause or contribute to the subsequent collapse of the North Tower, thus supporting Silverstein Properties’ claim that the terrorist attack represented two occurrences, entitling it to two $3.5 billion insurance policy limits. A separate study commissioned by the insurers contradicts this (see October 23, 2002). The Silverstein report apparently does not examine the collapse of WTC Building 7, a 47-story skyscraper that also collapsed on 9/11 (see (5:20 p.m.) September 11, 2001). It has been passed on to the National Institute of Standards and Technology (NIST), which is undertaking its own investigation of the WTC collapses (see August 21, 2002). [New York Times, 9/30/2002; Business Insurance, 10/23/2002; Silverstein Properties, Inc., 10/23/2002 pdf file; Engineering News-Record, 10/25/2002; New York Times, 10/29/2002; Engineering News-Record, 11/4/2002; Real Estate Weekly, 4/30/2003]

Entity Tags: World Trade Center, Silverstein Properties, Thornton-Tomasetti Engineers, Weidlinger Associates, Matthys Levy

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Insulated trusses in the World Trade Center.
Insulated trusses in the World Trade Center. [Source: Gilsanz Murray Steficek]At a press briefing in New York City, the National Institute of Standards and Technology (NIST) releases a 122-page progress report on its investigation into the WTC collapses. NIST began its study in August 2002 (see August 21, 2002). Investigators say they believe that the Port Authority of New York and New Jersey, who built the Twin Towers, failed to carry out vital tests to establish how the buildings would cope with a major fire. They have been unable to find evidence that tests were conducted on the fireproofing material used in the buildings. Their report also states that in 1969, builders directed contractors to coat the WTC floor supports with half an inch of spray-on fireproofing. In 1999, the Port Authority issued guidelines to triple the thickness of the fireproofing, and by 9/11, about 30 floors in the upper areas of the two towers had been upgraded. Almost all the floors in the impact zone of the North Tower had their fireproofing upgraded, while in the South Tower just the 78th floor—the lowest in its impact zone—had been upgraded. As the New York Times states, though, “investigators took great care… to say they were nowhere close to definitively determining how and why the towers collapsed after they were struck by hijacked airliners.” [National Institute of Standards and Technology, 5/2003, pp. 81; National Institute of Standards and Technology, 5/7/2003; Guardian, 5/8/2003; New York Times, 5/8/2003]

Entity Tags: National Institute of Standards and Technology, Port Authority of New York and New Jersey, 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

Both towers of the World Trade Center tilted to one side before beginning to fall on 9/11 (see 9:59 a.m. September 11, 2001 and 10:28 a.m. September 11, 2001). The National Institute of Standards and Technology, which investigated the collapses (see August 21, 2002), states that the South Tower, which was hit on its south side, tilted about 7-8 degrees to the east and 3-4 degrees to the south, and the North Tower, which was hit on its north side, tilted about 8 degrees to the south, before starting to fall. [National Institute of Standards and Technology, 9/2005, pp. 300, 308 pdf file] However, these findings are criticized by Canadian scientist Frank Greening. After examining photo and video evidence, Greening says that the South Tower tilted by no more than two degrees and the North Tower by no more than three degrees before collapse initiation. Greening also says that the tilt angles NIST gives cannot correspond to the downward movement of the towers’ walls NIST claims before they started to fall, and points out that the tilt angles NIST uses are inconsistent throughout its reports. Though Greening agrees with NIST that the towers were destroyed by the plane impacts and fire damage, he concludes that its computer model is “highly inaccurate and therefore of no value in explaining the demise of the Twin Towers.” [Greening, 11/2005 pdf file] Greening is a leading figure in the post-9/11 dispute over why the WTC collapsed and publishes a series of papers dealing with various aspects of the Twin Towers’ collapse. For example, a CBC documentary uses Greening for analysis of the WTC’s fall. [Canadian Broadcasting Corporation, 8/25/2005]

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

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

Dr. S. Shyam Sunder, head of the National Institute of Standards and Technology government investigation into the collapse of the World Trade Center building, is asked about the collapse of WTC Building 7. Sunder says that he hopes to release something about that by the end of 2006. He adds, NIST did have some “preliminary hypotheses… We are studying the horizontal movement east to west, internal to the structure, on the fifth to seventh floors.… But truthfully, I don’t really know. We’ve had trouble getting a handle on building No. 7.” [New York Magazine, 3/20/2006]

Entity Tags: Shyam Sunder, 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

Former 9/11 Commission co-chair Lee Hamilton.Former 9/11 Commission co-chair Lee Hamilton. [Source: CBC]Lee Hamilton, the former co-chair of the 9/11 Commission, gives a wide-ranging interview to the CBC about Without Precedent, a book he recently co-authored about his time on the 9/11 Commission (see August 15, 2006). In the interview he discusses the various “conspiracy theories” surrounding the events of 9/11. The interviewer, Evan Solomon, mentions to him a recent Zogby poll (see May 17, 2006) that found that 42% of Americans agreed that “the US government, and its 9/11 Commission, concealed or refused to investigate critical evidence that contradicts the official explanation of September 11th.” Hamilton calls this lack of trust in the Commission’s report “dispiriting,” but attacks the “conspiracy theory people,” saying, “when they make an assertion they do it often on very flimsy evidence.” He addresses some of the various “conspiracy theories” that have been put forward about 9/11:
bullet In order to contradict the allegation that the Twin Towers were brought down deliberately with pre-planted explosives, Hamilton says the WTC collapsed (see 8:57 a.m. September 11, 2001) because “the super-heated jet fuel melted the steel super-structure of these buildings and caused their collapse.” He adds, “There’s a powerful lot of evidence to sustain that point of view, including the pictures of the airplanes flying into the building.”
bullet With regard to the collapse of WTC Building 7 (see (5:20 p.m.) September 11, 2001), which some people claim was also caused by explosives, he argues, “[W]e believe that it was the aftershocks of these two huge buildings in the very near vicinity collapsing. And in the Building 7 case, we think that it was a case of flames setting off a fuel container, which started the fire in Building 7, and that was our theory on Building 7.” However, the interviewer points out that the 9/11 Commission’s final report does not actually mention the collapse of Building 7, and Hamilton says he does not recall whether the Commission made a specific decision to leave it out.
bullet In reply to a question about why the debris of Building 7 were moved quickly from the scene without a thorough investigation, even though nobody died in Building 7 and there was no need for rescue operations there, Hamilton responds, “You can’t answer every question when you conduct an investigation.”
bullet When asked whether Saeed Sheikh sent Mohamed Atta $100,000 for the 9/11 plot (see Early August 2001 and Summer 2001 and before), Hamilton replies, “I don’t know anything about it.” When the interviewer presses him about whether the Commission investigated a possible Pakistani Secret Service (ISI) connection to the attacks, Hamilton replies, “They may have; I do not recall us writing anything about it in the report. We may have but I don’t recall it.”
bullet Asked about Secretary of Transportation Norman Mineta’s claim that Vice President Dick Cheney was in the presidential bunker beneath the White House at 9:20 a.m. on 9/11 (see (Between 9:20 a.m. and 9:27 a.m.) September 11, 2001), almost 40 minutes earlier than the Commission claimed he had arrived there, Hamilton replies, “I do not recall.” When pressed, he expands, “Well, we think that Vice President Cheney entered the bunker shortly before 10 o’clock. And there is a gap of several minutes there, where we do not really know what the Vice President really did. There is the famous phone call between the President and the Vice President. We could find no documentary evidence of that phone call.”
bullet When the interviewer points out that Richard Clarke’s account conflicts with the Commission’s over what time authorization was received from Dick Cheney to shoot down Flight 93 (see (Between 9:45 a.m. and 9:56 a.m.) September 11, 2001 and (Between 10:00 a.m. and 10:15 a.m.) September 11, 2001), Hamilton retorts, “Look, you’ve obviously gone through the report with a fine-toothed comb, you’re raising a lot of questions—I can do the same thing.”
The interviewer also asks Hamilton whether he has any unanswered questions of his own about 9/11. Hamilton’s response is: “I could never figure out why these 19 fellas did what they did. We looked into their backgrounds. In one or two cases, they were apparently happy, well-adjusted, not particularly religious - in one case quite well-to-do, had a girlfriend. We just couldn’t figure out why he did it. I still don’t know.” [Canadian Broadcasting Corporation, 8/21/2006]

Entity Tags: Saeed Sheikh, World Trade Center, Richard (“Dick”) Cheney, Pakistan Directorate for Inter-Services Intelligence, Lee Hamilton, 9/11 Commission, Richard A. Clarke, Mohamed Atta, Norman Mineta

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

After the National Institute of Standards and Technology (NIST) announces the results of its investigation into the collapse of World Trade Center Building 7, some critics dispute its explanation for the collapse and question its apparent debunking of claims that explosives were used to demolish the building. The 47-story tower collapsed late in the afternoon of 9/11, even though no plane hit it (see (5:20 p.m.) September 11, 2001). Some have argued that fire and the falling debris from the Twin Towers’ collapses should not have brought down such a large steel and concrete structure. [Associated Press, 8/21/2008]
NIST Lacks 'the Expertise on Explosives' - James Quintiere, a professor of fire protection engineering at the University of Maryland who previously worked as the chief of NIST’s fire science and engineering division, says that NIST does not “have the expertise on explosives, so I don’t know how they came to that conclusion,” that explosives did not cause the collapse. However, Quintiere says he never personally believed explosives were involved. [Los Angeles Times, 8/22/2008] Richard Gage, a California architect and leader of a group called Architects and Engineers for 9/11 Truth, complains, “How much longer do we have to endure the cover-up of how Building 7 was destroyed?” The New York Times points out that “the collapse of 7 World Trade Center—home at the time to branch offices of the Central Intelligence Agency, the Secret Service, and the Giuliani administration’s emergency operations center—is cited in hundreds of Web sites and books as perhaps the most compelling evidence that an insider secretly planted explosives, intentionally destroying the tower.” [New York Times, 8/21/2008]
NIST Presentation - At a presentation of its findings earlier in the day, NIST announced that, in its three-year study of the collapse, it found no evidence showing explosives were used to bring the building down. [National Institute of Standards and Technology, 8/21/2008; National Institute of Standards and Technology, 8/21/2008] During his summary of the findings of NIST’s WTC 7 investigation (see August 21, 2008), lead investigator Shyam Sunder said, “We did not find any evidence that explosives were used to bring the building down.” [National Institute of Standards and Technology, 8/21/2008]
'No Witness Reports' of Loud Explosions - In the draft version of its final report on the collapse, which is released on this day (see August 21, 2008), NIST explains: “Blast from the smallest charge capable of failing a critical column… would have resulted in a sound level of 130 dB to 140 dB at a distance of at least half a mile if unobstructed by surrounding buildings.… This sound level is consistent with standing next to a jet plane engine and more than ten times louder than being in front of the speakers at a rock concert. There were no witness reports of such a loud noise, nor was such a noise heard on the audio tracks of video recordings of the WTC 7 collapse.” [National Institute of Standards and Technology, 8/2008, pp. 44-45 pdf file]
NIST Rules out Thermite - Skeptics have argued that an incendiary material called thermite was used to bring down WTC 7 (see August 4, 2008), and this would not necessarily have created such a loud explosive boom. [New York Times, 8/21/2008] But in a fact sheet published on this day, NIST responds: “To apply thermite to a large steel column, approximately 0.13 lb of thermite would be needed to heat and melt each pound of steel. For a steel column that weighs approximately 1,000 lbs. per foot, at least 100 lbs. of thermite would need to be placed around the column, ignited, and remain in contact with the vertical steel surface as the thermite reaction took place. This is for one column… presumably, more than one column would have been prepared with thermite, if this approach were to be used. It is unlikely that 100 lbs. of thermite, or more, could have been carried into WTC 7 and placed around columns without being detected, either prior to Sept. 11 or during that day.” [National Institute of Standards and Technology, 8/21/2008] Sunder says that investigators therefore decided not to use their computer model to evaluate whether a thermite-fueled fire might have brought down WTC 7. Pointing to the omission, one skeptic says, “It is very difficult to find what you are not looking for.” [New York Times, 8/21/2008] In a 2006 fact sheet, NIST in fact admitted it “did not test for the residue” of explosives or thermite in the remaining structural steel from the WTC collapses (see August 30, 2006). [National Institute of Standards and Technology, 8/30/2006] And, as the New York Times notes, “Adding to the suspicion is the fact that in the rush to clean up the site, almost all of the steel remains of the tower were disposed of, leaving investigators in later years with little forensic evidence” (see Shortly After September 11, 2001 and September 12-October 2001). [New York Times, 8/21/2008]
Extensive Preparations for Demolition - NIST’s new fact sheet also points out: “For [WTC 7] to have been prepared for intentional demolition, walls and/or column enclosures and fireproofing would have to be removed and replaced without being detected. Preparing a column includes steps such as cutting sections with torches, which produces noxious and odorous fumes. Intentional demolition usually requires applying explosive charges to most, if not all, interior columns, not just one or a limited set of columns in a building.” [National Institute of Standards and Technology, 8/21/2008]

Entity Tags: Richard Gage, National Institute of Standards and Technology, Shyam Sunder, World Trade Center, James Quintiere

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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