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WTC 7 was on fire for about 5 hours, with about 7 or 8 floors on fire as a result of WTC 1/2 debris crashing into the building and starting fires. It wasn't hel
by jcranmer 5y ago
WTC 7 was on fire for about 5 hours, with about 7 or 8 floors on fire as a result of WTC 1/2 debris crashing into the building and starting fires. It wasn't helped by the water mains failing due to the collapse of WTC 1/2, which meant the sprinklers failed in the lower portion of the building.