Reply To: Engineering Prof releases draft report on 9/11 collapse of WTC Bldg 7 in NYC


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#47014
Clark
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Dave, each of the Twin Towers was like a hundred cheap supermarkets stacked in a vertical frame, each one’s heavy concrete floor laid on the fragile corrugated roof of the one below. The top ten of them all fell onto the rest below, smashing through floor after floor until all that churning rubble pulverised itself against the ground.