354th SFS Mark 19 training
Airman Jeffery Gibson, a 354th Security Forces Squadron response force member, fires a Mark-19 grenade launcher Sept. 9, 2015, at Eielson Air Force Base, Alaska. Members of the squadron must show proficiency annually to be qualified on the weapon. (U.S. Air Force photo/Staff Sgt. Shawn Nickel)
Staff Sgt. Shawn Nickel
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