Army Lt. Col. Christopher M. Rizzo fires an MK 19 automatic grenade launcher at a range on Joint-Base Lewis McChord, Wash., July 10, 2014. Rizzo, who commands Headquarters and Headquarters Battalion, I Corps, was familiarizing himself with the launcher as part of the shift of his unit's mission as an expeditionary force in the Pacific.
U.S. Army photo by Staff Sgt. Micah VanDyke
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