354th SFS Mark 19 training
A response force member from the 354th Security Forces Squadron loads 40mm rounds into a Mark 19 grenade launcher Sept. 9, 2015, at Eielson Air Force Base, Alaska. The launcher was first developed in the Vietnam War and has been developed since to be more reliable in combat. (U.S. Air Force photo by Staff Sgt. Shawn Nickel/Released)

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Photo by: Staff Sgt. Shawn Nickel |  VIRIN: 150909-F-FT438-041.JPG