MCCHORD FIELD, Wash. - (Left to right) Senior Airman James Trevizo and Staff Sgt. Samuel Roman, 446th Security Forces Squadron here, practice barrel changes on an M240 7.62mm machine gun from a defensive fighting position while training July 14. Reservists from the 446th SFS are preparing for their unit’s first ever participation in an Operational Readiness Inspection at Volk Field, Wis., in October. (U.S. Air Force photo by Tech. Sgt. Elizabeth Moody)