U.S. Marines with Battalion Landing Team, 1st Battalion, 4th Marine Regiment, 13th Marine Expeditionary Unit (MEU) provide security while an MV-22 Osprey tiltrotor aircraft takes off during an embassy reinforcement exercise at Arta Range in Djibouti Oct. 26, 2013. The 13th MEU was deployed with the Boxer Amphibious Ready Group as a theater reserve and crisis response force throughout the U.S. 5th Fleet area of responsibility.