Severed and softening core columns, not failing floors, triggered WTC collapse | Hacker News

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		Severed and softening core columns, not failing floors, triggered WTC collapse (metabunk.org)
		3 points by BostonFern 3 days ago \| hide \| past \| favorite \| 1 comment

throwmeaway222 3 days ago [–]

What about building 7

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