Colombian Air Force Kfir fighter jet crew chiefs signal a Kfir pilots on the flightline in preparation to a night mission flight during Red Flag 18-3 at Nellis Air Force Base, Nev., July 31, 2018. The Colombian Air Force’s Kfir figher jets are training alongside U.S. Forces for Red Flag 18-3 in realistic air-to-air combat training scenarios. (U.S. Air Force photo by Staff Sgt. Angela Ruiz)