U.S. Air Force Staff Sgt. James Rasor, a crew chief assigned to the 112th Expeditionary Fighter Squadron, marshals an F-16 Fighting Falcon Feb. 18, 2016, during exercise COPE NORTH 16 at Andersen Air Force Base, Guam. Training exercises such as CN16, allow the U.S., Japan and Australia air forces to develop combat capabilities, enhancing air superiority, electronic warfare, air interdiction, tactical airlift and aerial refueling. (U.S. Air National Guard photo by Staff Sgt. Shane Hughes/Released)