LANGLEY AIR FORCE BASE, Va. -- Eric Seto, Ultimate Training Munitions training manager, assists 633d Security Forces Squadron Airmen in loading UTM training ammunition into M4 assault rifles during UTM ballistics training at Bethel Park Feb. 3. UTM rounds allow combat arms trainers to “get in front of the weapon,” to observe operator mechanics such as trigger pull, weapon handling and clearing malfunction drills. (U.S. Air Force photo/Airman 1st Class Jason J. Brown) (RELEASED)