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<blockquote data-quote="anonymous23456" data-source="post: 5701405" data-attributes="member: 104188">&#039;World Trade Center Building 7 collapsed at 5:20 p.m. on Sept. 11, 2001, after burning for seven hours, according to a Federal Emergency Management Agency<a href="https://www.fema.gov/pdf/library/fema403_ch5.pdf" target="_blank"> report</a>. It said the collapse of the building was a direct result of fires stimulated by debris from the collapse of World Trade Center Tower 1.The National Institute of Standards and Technology also <a href="https://www.nist.gov/pao/questions-and-answers-about-nist-wtc-7-investigation" target="_blank">says on its website</a> that “heat from the uncontrolled fires caused steel floor beams and girders to thermally expand,&quot; causing a key structural column to fail and initiating the collapse of the entire building.The site also says investigators &quot;found no evidence supporting the existence of a blast event.&quot;&#039;</blockquote>

[QUOTE="anonymous23456, post: 5701405, member: 104188"] 'World Trade Center Building 7 collapsed at 5:20 p.m. on Sept. 11, 2001, after burning for seven hours, according to a Federal Emergency Management Agency[URL='https://www.fema.gov/pdf/library/fema403_ch5.pdf'] report[/URL]. It said the collapse of the building was a direct result of fires stimulated by debris from the collapse of World Trade Center Tower 1. The National Institute of Standards and Technology also [URL='https://www.nist.gov/pao/questions-and-answers-about-nist-wtc-7-investigation']says on its website[/URL] that “heat from the uncontrolled fires caused steel floor beams and girders to thermally expand," causing a key structural column to fail and initiating the collapse of the entire building. The site also says investigators "found no evidence supporting the existence of a blast event."' [/QUOTE]

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