Cpl. Ian M. Keyser briefs members of his convoy on

Cpl. Ian M. Keyser briefs members of his convoy on their mission during a combat convoy simulator at Marine Corps Base Camp Lejeune, N.C., Sept. 9, 2015. Marines with 2nd Low Altitude Air Defense Battalion tested their combat skills and decision making as they maneuvered through a simulated desert, mimicking the possible scenarios they could encounter while in a real-life scenario. The training simulator allowed the Marines to efficiently train in a controlled environment without sacrificing safety or accuracy. Keyser is a low altitude air defense gunner with 2nd LAAD based out of Marine Corps Air Station Cherry Point, N.C. (U.S. Marine Corps photo by Cpl. N.W. Huertas/Released)