Corporal John Efferen, a Gainesville, Fla., native and tank maintenance chief with tank platoon for Battalion Landing Team 1st Battalion, 2nd Marine Regiment, 24th Marine Expeditionary Unit, switches out his tools while conducting maintenance checks on an M1A1 Abrams tank, June 19, 2012. The tank platoon and other Marines from the 24th MEU unloaded from USS Iwo Jima to conduct maintenance and prepare for future training exercises ashore. 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.