U.S. Air Force, Japan Air Self-Defense Force and Royal Australian air force aircraft fly in formation during Cope North 15, Feb. 17, 2015, off the coast of Guam. During the exercise, the U.S., Japan and Australia air forces worked on developing combat capabilities enhancing air superiority, electronic warfare, air interdiction, tactical airlift and aerial refueling. (U.S. Air Force photo by Tech. Sgt. Jason Robertson)