Lt. Col. Joshua Yerk, right, 436th Civil Engineer Squadron commander, assumes command of the 436th CES from Col. Phelemon Williams, left, 436th Mission Support Group commander, during a change of command ceremony held at the base fire station on Dover Air Force Base, Delaware, June 23, 2022. Team Dover Airmen, family members and guests watched Yerk assume command of the 436th CES. Guidon bearer for the ceremony was Chief Master Sgt. Andrew Kehl, center, 436th CES fire chief. (U.S. Air Force photo by Roland Balik)
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