Sgt. Maurice Rice, tank commander, Alpha Company, 1st Tank Battalion, navigates an M1A1 abrams main battle tank in support of Exercise Desert Scimitar 2014 aboard Marine Corps Air Ground Combat Center Twentynine Palms, Calif., May 13, 2014. Rice, from Chicago, assumes leadership and responsibility for the vehicle and crew. He also give the command to fire the main gun and ensures everyone understands the mission. (U.S. Marine Corps photo by Cpl. Christopher J. Moore/Released)