An F-16 Fighting Falcon assigned to the 310th Fighter Squadron sits on the flight line at Luke Air Force Base, Ariz., Dec. 12, 2017. The 310th FS graduated their latest F-16 Basic Course class Dec. 13, and retired Air Force pilot Lt. Col. Bob Pardo spoke at the ceremony and addressed the graduates. (U.S. Air Force photo/Senior Airman Ridge Shan)