U.S. Air Force Senior Airman Mark Walker, 633rd Security Forces Squadron armorer, field strips an M9 handgun at the squadron armory at Langley Air Force Base, Va., June 11, 2014. The armorers ensure each weapon is serviceable, performing routine cleaning and minor maintenance on the more than 1,000 firearms in the inventory. (U.S. Air Force photo by Senior Airman Jason J. Brown/Released)