Colonel John Grimm, 90th Security Forces Group commander, stands at parade rest with his group's formation during the 90th Missile Wing change of command ceremony on the Argonne Parade Field at F.E. Warren Air Force Base, Wyo., June 23, 2017. Grimm leads four squadrons responsible for defending the installation which supports more than 7,000 personnel, a weapons storage area and 150 Minuteman III ICBMs and their related infrastructure spread throughout a 9,600 square-mile area across Wyo., Neb., and Colo. The change of command ceremony signified the transition of command from Col. Stephen Kravitsky to Col. Stacy Huser. (U.S. Air Force photo by Staff Sgt. Christopher Ruano)