A 44th Fighter Squadron F-15 Eagle pilot signals completion of aerial refueling from a 909th Air Refueling Squadron KC-135 Stratotanker during the large force employment of exercise Cope North 16, Feb. 24, 2016, at Andersen Air Force Base, Guam. Through training exercises such as CN16, the U.S., Japan and Australian air forces develop combat capabilities, enhancing air superiority, electronic warfare, air interdiction, tactical airlift and aerial refueling. (U.S. Air Force photo by Staff Sgt. Matthew B. Fredericks/Released)