WATCH LIVE: NYC Ceremony on 13th Anniversary of 9/11

Hundreds of people gathered at the site of the World Trade Center for a ceremony to remember the 2,983 people killed in the 2001 and 1993 attacks. Family members of the victims have been invited to read names.

A citywide moment of silence will be held at 8:46 a.m., the time the first hijacked plane flew into the North Tower, and at five additional times throughout the morning, marking the time of impact of three other planes and the time the two towers fell.