Time-Lapse Video of the 9/11 Memorial | NBC New York

New York City and the nation mark 15 years since the Sept. 11 attacks

Time-Lapse Video of the 9/11 Memorial

This time-lapse video shows the 9/11 memorial being constructed from 2004 to 2011. The memorial opened to the families on the 10th anniversary and to the public a day later.

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