Lt. Col. Matthew Gaetke, 310th Fighter Squadron commander, and retired Air Force pilot Lt. Col. Bob Pardo, watch as an F-16 Fighting Falcons take off at Luke Air Force Base, Ariz., Dec. 12, 2017. Pardo visited Luke to speak at the graduation of the latest 310th FS F-16 Basic Course class. (U.S. Air Force photo/Senior Airman Ridge Shan)