Britain's Prince Charles, centre, with Britain's Prime Minister David Cameron, left, and U.S. Ambassador Louis Susman, right, as they attend a ceremony at the 9/11 Memorial Garden in London, to mark the 10th anniversary of the U.S. attacks, Sunday Sept. 11, 2011. (AP Photo / Luke MacGregor)
International 9/11 Memorials
People around the world honor the victims of the September 11 attacks.