Lt. Col. Christopher Harris, 403rd Operations Support Squadron commander at Keesler Air Force Base, Miss., addresses his new squadron during a change of command ceremony June 6, 2021. Prior to serving as commander, Harris was the chief standards and evaluations officer for the 53rd Weather Reconnaissance Squadron where he was in charge of the section that evaluates the performance of all aircrew members in the unit. (U.S. Air Force photo by Staff Sgt. Shelton Sherrill)