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Context of '9:59 a.m. September 11, 2001: South Tower of WTC Collapses'

This is a scalable context timeline. It contains events related to the event 9:59 a.m. September 11, 2001: South Tower of WTC Collapses. You can narrow or broaden the context of this timeline by adjusting the zoom level. The lower the scale, the more relevant the items on average will be, while the higher the scale, the less relevant the items, on average, will be.

Within minutes of the second World Trade Center tower being hit, United Airlines tells the FAA’s Boston Center that Flight 175 is down. This is according to Colin Scoggins, a civilian manager who is the military liaison at the Boston Center. Scoggins will later recall, “When we phoned United [after the second tower was hit], they confirmed that United 175 was down, and I think they confirmed that within two or three minutes.” [Vanity Fair, 8/1/2006] However, according to the 9/11 Commission, even though by 9:20 United Airlines suspects that the second plane to hit the WTC was Flight 175 (see Between 9:10 a.m. and 9:20 a.m. September 11, 2001), at that time the identity of the crashed aircraft is “still unconfirmed.” It is not until 9:22 that United issues an advisory to its facilities, stating that Flight 175 has been in an accident in New York (see 9:22 a.m. September 11, 2001). [9/11 Commission, 8/26/2004, pp. 26]

Entity Tags: Boston Air Route Traffic Control Center, Colin Scoggins, United Airlines

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

The North Tower collapses in a matter of seconds.The North Tower collapses in a matter of seconds. [Source: Ray Stubblebine/ Reuters/ Landov] (click image to enlarge)The North Tower of the World Trade Center tilts to the south and then collapses. Its north side was hit by Flight 11 at 8:46, 102 minutes earlier. [CNN, 9/12/2001; New York Times, 9/12/2001; MSNBC, 9/22/2001; Kim and Baum, 2002 pdf file; Associated Press, 8/21/2002; National Institute of Standards and Technology, 9/2005, pp. 33] After the antenna starts to move (see (10:28 a.m. September 11, 2001)), the next sign that the top section of the building is moving downward is on floor 98, at the top of the impact zone. [National Institute of Standards and Technology, 9/2005, pp. 22, 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] The death toll could have been much worse—an estimated 15,000 people made it out of the WTC to safety after 8:46 a.m. [St. Petersburg Times, 9/8/2002]

Entity Tags: World Trade Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline


Several small fires burn inside World Trade Center Building 7.
Several small fires burn inside World Trade Center Building 7. [Source: New York City Police Department]World Trade Center Building 7 is reported to be on fire. [CNN, 9/12/2001]

Entity Tags: World Trade Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

May 30, 2002: WTC Recovery Efforts End

Recovery efforts end at the World Trade Center site. [Associated Press, 5/31/2002]

Timeline Tags: Environmental Impact of 9/11

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