354th SFS Mark 19 training
Airman 1st Class Nathaniel Kibler, a 354th Security Forces Squadron response force member, loads a belt of rounds into a Mark 19 grenade launcher Sept. 9, 2015, at Eielson Air Force Base, Alaska. The weapon, which was first developed in the Vietnam War, takes two Airmen to operate, one to load and one to fire. (U.S. Air Force photo by Staff Sgt. Shawn Nickel/Released)

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Photo by: Staff Sgt. Shawn Nickel |  VIRIN: 150909-F-FT438-168.JPG