U.S. Marine Corps Lance Cpl. Ted L. Simmons, an assistant gunner assigned to Alpha Battery, 2d Low Altitude Air Defense Battalion, fires an M240B machine gun during Operation Rolling Thunder, at Fort Bragg, N.C., Oct. 18, 2014. The operation was held in order to better integrate the ground combat element with the aviation combat element in support of the Marine Air Ground Task Force. (U.S. Marine Corps photo by Lance Cpl. Koby I. Saunders/Released)