U.S. and Japan Air Self-Defense Force aircraft fly in formation during exercise Cope North 21, at Andersen Air Force Base, Guam, Feb. 9, 2021. Approximately 2,200 personnel and 97 aircraft were brought together for Cope North 21 with the mission to improve combat readiness, increase interoperability between U.S. Air Force, Royal Australian Air Force and Japan Air Self-Defense Force, or Koku-Jieitai. (U.S. Air Force video by Tech. Sgt. Eric Summers Jr.) More