World Trade Center ceremony in pictures

New York City Police Dept. bugler Gabe Perdomo warms up while standing next to the South Pool of the World Trade Center Memorial during the 11th anniversary ceremony to mark the terrorist attacks on the World Trade Center in New York, Tuesday, Sept. 11, 2012. (AP Photo/Justin Lane, Pool) <span class=meta>(AP Photo/ Justin Lane)</span>
September 11, 2012 9:28:13 AM PDT