U.S. Marines provide security while an MV-22 Osprey aircraft takes off during an embassy reinforcement exercise at the Arta Range training area near Camp Lemonnier, Djibouti, Oct. 26, 2013.The Marines, assigned to the 13th Marine Expeditionary Unit Battalion Landing Team, performed riot control and force protection during the training scenario. U.S. Air Force photo by Staff Sgt. Erik Cardenas