Marines with the maintenance platoon for Combat Logistics Battalion 24, 24th Marine Expeditionary Unit, remove the engine unit of an M1A1 Abrams tank at Camp Lemonnier, Djibouti, during semi-annual maintenance checks, June 18, 2012. The 24th MEU is deployed with the Iwo Jima Amphibious Ready Group as a theater reserve force for U.S. Central Command. The group is providing support for maritime security operations and theater security cooperation efforts in the U.S. Navy's 5th Fleet area of responsibility.