A U.S. Air Force Airman loads 5.56mm NATO rifle rounds into a magazine during M-4 Carbine training at Fort Eustis, Va., Oct. 30, 2014. 633rd Security Forces Squadron personnel trained with both the M-4 carbine and M-9 pistol during live-fire drills. (U.S. Air Force photo by Senior Airman Kayla Newman/Released)