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Visitors at the Sept. 11 memorial make impressions of specific names over a master list of the names of those killed in the 2001 terrorist attacks on the World Trade Center, Sunday, Sept. 11, 2011 in New York. (AP Photo/Seth Wenig, Pool)

Memorable moments: Ground Zero memorial ceremony

1 January 1970

A collection of moments from the 9/11 anniversary memorial ceremony in New York.