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Context of '9:58 a.m. September 11, 2001: Most Workers in South Tower Who Could Evacuate Have Done So'

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People inside the World Trade Center flee down a stairway.People inside the World Trade Center flee down a stairway. [Source: Shannon Stapleton]Almost all the occupants of the South Tower who are able to evacuate the building have done so and have crossed the street to safety. Only 11 occupants who were below the impact floors are still in the building when it collapses. However, 619 building occupants in or above the impact zone have either already died or perish in the collapse, as do many emergency workers. (National Institute of Standards and Technology 9/2005, pp. xxxix, 44) Most workers in the North Tower also leave the building before it collapses (see 10:27 a.m. September 11, 2001).

Almost all the occupants of the North Tower who are able to evacuate the building have done so. Only 107 occupants who were below the impact floors remain in the building, while around 7,400 have escaped. However, 1,355 building occupants in or above the impact zone have either already died or perish in the collapse, as do many emergency workers. Overall, 99 percent of building occupants below the impact floors escape to safety. (National Institute of Standards and Technology 9/2005, pp. xxxviii, 32) Most workers in the South Tower also left the building before it collapsed (see 9:58 a.m. September 11, 2001).


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)

Recovery efforts end at the World Trade Center site. (Ibarguen 5/31/2002)


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