F-16 Fighting Falcons from the 555th Fighter Squadron prepare to take off during Astral Knight 2019 from Aviano Air Base, Italy, June 4, 2019. U.S. Air Force F-16s, F-35s, B-52s, KC-135s, E-3s, Italian air force F-35s, Typhoons, aerial refueling aircraft and an airborne warning and control system aircraft and Croatian MiG-21s flew together during Astral Knight 2019. (U.S. Air Force photo by Airman 1st Class Caleb House)