A Marine with Company A, 1st Tank Battalion, 1st Marine Division, refuels an M1A1 Abrams Main Battle Tank during Exercise Desert Scimitar aboard Marine Corps Air Ground Combat Center Twentynine Palms, Calif., April 13, 2015. The training gave the Marines the opportunity to refine and rehearse essential combat skills needed in a battlefield environment. Desert Scimitar is an annual exercise that includes elements from the I Marine Expeditionary Force. The exercise focused on conventional operations and provided realistic training that prepared Marines for overseas operations. (U.S. Marine Corps photo by Sgt. Christopher J. Moore/Released)