18 of 19: Shown in this combo image are two documentations of the before and after of the September 11, 2001, terrorist attack in New York City. (Top) A jet airliner is lined up on one of the World Trade Center towers in New York. (Below) A fireball explodes from one of the World Trade Center towers after a jet airliner crashed into the building Tuesday, Sept. 11, 2001, in New York. (AP Photo/Carmen Taylor) (Photo/Carmen Taylor)

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