U.S. Air Force Staff Sgt. Danielle Allen, 633rd Security Forces Squadron member, fine tunes her sight on a 5.56mm M4 Carbine during Combat Arms Training and Maintenance training at Langley Air Force Base, Va., Nov. 1, 2012. Security Forces personnel access their accuracy through qualification tests. (U.S. Air Force photo by Senior Airman Racheal E. Watson/Released)