Smoke billows from one of the towers of the World Trade Center and flames and debris explode from the second tower, Tuesday, Sept. 11, 2001.

2001年9月11日，星期二，黑烟从世贸大厦双塔的其中以塔喷涌而出，烈火和碎片从第二座塔爆裂开。

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Debris through the tower to begin to explore the new world, everything seems full of hope.

通过塔的碎片，开始对新的世界进行探索的时候，一切都看起来充满了希望。

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The North Tower of the World TradeCenter dissolves in a cloud of dust and debris about a half hour after thefirst twin tower collapsed, on September 11, 2001.

在南塔垮塌半个小时后，世贸中心北塔在一片灰尘中消失。

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And as she headed back toward her apartment, four blocks from what was soon to be known as ground zero, the south tower collapsed, sending a plume of debris into the air and straight down her street.

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