9-11 Memorial
The New York City World Trade Center lights and Pentagon flag are both tributes to those who lost their lives in the September 11, 2001 attacks. Monday marks the five-year anniversary since the 9-11 attacks in New York City, the Pentagon and Pennsylvania. U.S. Air Force photo illustration/Jennie Hess and Michael Mullen. U.S. Air Force photo/Kenn Mann (World Trade Center) and U.S. Coast Guard photo/Lt. Cmdr. Scott Gureck (Pentagon).