People place flowers to mourn victims of 9/11 terror attacks (5)

A volunteer places a flower next to his friend's name on a plate on which the names of 9/11 victims were inscribed around the South Pool at the National September 11 Memorial and Museum in New York, the United States, on Sept. 11, 2017. People paid their tributes here on Monday to mourn the victims of the 9/11 terror attacks which happened 16 years ago and claimed thousands of lives. (Xinhua/Wang Ying)