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PETERSON SPACE FORCE BASE, Colo. – U.S. Air Force Lt. Col. Timothy Fryar, 21st Civil Engineer Squadron outgoing commander, right, relinquishes command during the squadron’s change of command ceremony at Peterson Space Force Base, Colorado, July 29, 2021. The 21st CES prepares military personnel for worldwide mobility contingencies. On Peterson SFB, they maintain, repair and construct essential facilities and utility infrastructure systems to include electrical power systems, water and natural gas distribution systems, base roads and pavements. Fire protection and prevention, as well as environmental and family housing programs are also managed by the 21st CES Airmen and Federal civilians. (U.S. Space Force photo by Airman Aaron Edwards)