U.S. Marine Corps Private First Class Kent L. Frey, a gunner with Bravo battery, 2nd Low Altitude Air Defense Battalion (2D LAAD), attaches a propeller to a Remote Piloted Vehicle Target before a live-fire training exercise at Onslow Beach, Camp Lejeune, N.C., March 17, 2014. 2D LAAD conducted the live-fire training to better familiarize the Marines with the Stinger missile weapon system. (U.S. Marine Corps photo by Lance Cpl. Austin A. Lewis/Released)