Despite the explosions, less than half of the ten thousand gallons of jet fuel from Flight 11 burned in the initial fiery blasts. The rest sprayed through the impact floors and nourished fires that consumed combustibles from the plane and the office furnishings. Those fires fed off fresh air that flowed into the torn-open building. As flames gathered strength and spread, trapped survivors rushed toward sealed and broken windows in desperation. At the same time, the fires began to threaten the remaining support columns that already carried a heavier-than-normal load from their broken neighbors.
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