U.S. Marines with the 11th Marine Expeditionary Unit (MEU), replace a M1A1 Abrams tank engine with the help of an M88 tank retriever during sustainment training at D’Arta Plage, Djibouti, Nov. 6. The 11th MEU is deployed as a theater reserve and crisis response force throughout U.S. Central Command and the U.S. 5th Fleet area of responsibility. (U.S. Marine Corps photos by Gunnery Sgt. Rome M. Lazarus/Released)