U.S. Air Force Staff Sgt. Anthony Lester, 736th Security Forces Squadron, and Senior Airman Marc Loflin, 824th Base Defense Force, fire at opposing participating in the SF field training exercise during Exercise Cope North on Andersen Air Base, Guam, March 2, 2017. Cope North is an annual multilateral exercise designed to enhance air operations between U.S. Air Force, U.S. Navy, Japan Air Self Defense Force and the Royal Australian Air Force.