U.S. Air Force, Marine Corps and Navy aircraft fly in formation alongside Japan Air Self-Defense Force and Royal Australian Air Force aircraft during exercise Cope North 18 in the vicinity of Guam, Feb. 21, 2018. Cope North is a long-standing exercise designed to strengthen relationships in the Indo-Pacific region through air operations, humanitarian assistance/disaster relief training. (U.S. Air Force photo by Senior Airman Jarrod Vickers)