9/11 Tenth Anniversary (2001-2011)

Photo by Seth Wenig-Pool/Getty Images

NEW YORK, NY - SEPTEMBER 11: Police officers observe a moment of silence during the tenth anniversary ceremonies of the September 11, 2001 terrorist attacks at the World Trade Center site, September 11, 2011 in New York City. New York City and the nation are commemorating the tenth anniversary of the terrorist attacks on lower Manhattan which resulted in the deaths of 2,753 people after two hijacked planes crashed into the World Trade Center.