U.S. Air Force Col. Robert Burgess, Col. Shawn Werchan and Lt. Col. Joanna Mitchell stand at attention during a change of command ceremony for the 307th Operations Support Squadron at Barksdale Air Force Base, Louisiana, November 5, 2018. Mitchell, who has more than 20 years of service in the Air Force, took command of the 307th OSS during the ceremony. (U.S. Air Force photo by Tech. Sgt. Cody Burt)