U.S. Air Force Lt. Col. Richard J. Nelson, commander of the 31st Operations Group, takes back a guidon from Lt. Col. Benjamin S. Freeborn, outgoing commander of the 510th Fighter Squadron, during a change of command ceremony at Aviano Air Base, Italy, June 21, 2019. The exchange of the guidon represents a change in command position. (U.S. Air Force photo by Staff Sgt. Rebeccah Woodrow)