U.S. Marine Corps Sgt. Jason D. Murphy, a platoon sergeant

U.S. Marine Corps Sgt. Jason D. Murphy, a platoon sergeant assigned to Alpha Battery, 2d Low Altitude Air Defense Battalion, prepares to leave Landing Zone Falcon range during Operation Heavy Metal aboard Marine Corps Base Camp Lejeune, N.C., Aug. 10, 2014. The operation was conducted to maintain weapons efficiency and to improve cohesion between active and reservist infantry units. (U.S. Marine Corps photo by Pfc. Koby I. Saunders/Released)