Chief Master Sgt. Calvin Williams, AFGSC command chief, fires a grenade launcher at the 620th Ground Combat Training Squadron at Camp Guernsey, Wyo., July 21, 2016. During the visit, Williams tested and reviewed weapons used by security forces personnel. ( Air Force photo by Airman 1st Class Malcolm Mayfield)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: .., 20, 20th, 620th, 90, 90th, af, afb, afgsc, air, camp, command, force, gcts, gen., global, guernsey, icbm, missile, mw, rand, strike, warren, wing