U.S. Air Force Lt. Col. Joanna Mitchell, 307th Operations Support Squadron commander, stands at attention during a change of command ceremony for the unit at Barksdale Air Force Base, Louisiana, Nov. 3, 2018. Mitchell has more than 2300 flight hours, including 273 combat hours. She holds two three degrees and is a graduate of the Air War College. (U.S. Air Force photo by Tech. Sgt. Cody Burt)