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Originally posted by ANOK
Well I watched that video which doesn't really tell me anything. But if the core was still standing, after the outer walls fell, what caused the core to collapse?
The core was the strongest part of the building, right?
None of the chiefs present believed a total collapse of either tower was possible. Later, after the Mayor had left, one senior chief present did articulate his concern that upper floors could begin to collapse in a few
hours, and so he said that firefighters thus should not ascend above floors in the sixties.