Three U.S. Air Force F-16 Fighting Falcons assigned to the 480th Fighter Squadron fly in formation over Spangdahlem Air Base, Germany, May 30, 2017. The 185th Air Refueling Wing Air National Guard of Sioux City, Iowa will be conducting air-to-air refueling training May 21 – June 2. (U.S. Air Force photo by Senior Airman Dawn M. Weber)