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9/11 World Trade Center collapse

The claim that jet fuel melted steel beams in the 9/11 World Trade Center collapse, and the subsequent investigations and debates about the cause of the collapse.

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Jan 29, 2026
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Before Building 7, there has never been a steel building that melted from fire.

Before the collapse of on September 11, 2001, the professional literature and historical surveys cited here show no precedent for a totally collapsing primarily because of fire; is widely reported as ...