19 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) New Yorkers walk over the Brooklyn Bridge on their way to work, April 7, 1980, during the transit strike. (Below) People flee the scene of the attacks on the World Trade center on September 11, 2001. (AP Photo/Carlos Rene Perez (Top), Mark Lennihan(Bottom)) (Photo/Carlos Rene Perez)

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