U.S. marks 15th anniv. of 9/11 attacks(6/6)

A woman cries during a ceremony marking the 15th anniversary of September 11 attacks at the National 9/11 Memorial, in New York, the United States, on Sept. 11, 2016. The United States on Sunday commemorated the 15th anniversary of the 9/11 attacks. (Photo/Xinhua)