U.S. Air Force Staff Sgt. Ryan Davis, F-16 Viper Demonstration Team aircraft engines craftsman, performs preflight checks on an F-16 Fighting Falcon on the flight line at Davis-Monthan Air Force Base, Ariz., March 2, 2019. Air Combat Command and Air Education Training Command demonstration team Airmen supported heritage flights to honor past and present service members at the 2019 Heritage Flight Training Course. (U.S. Air Force photo by Senior Airman Kathryn R.C. Reaves)