Senior foreign and U.S. attachés lay a wreath at the Mount Rushmore National Memorial, S.D., Sept. 11, 2016, on behalf of the Foreign Defense Attaché Corps. The wreath laying ceremony was conducted in honor of the 15th anniversary of the attacks on Sept. 11, 2001, that occurred in New York, Virginia and Pennsylvania. (U.S. Air Force photo by Senior Airman Anania Tekurio)