A Japan Air Self-Defense Force E-757, an airborne early warning and control aircraft, soars over Misawa Air Base, Japan, April 19, 2017. The E-757 was one of 18 aircraft that participated in a bi-annual bilateral training exercise, part of a continuous exercise program to enhance interoperability between U.S. and Japan forces. (U.S. Air Force photo by Staff Sgt. Melanie A. Hutto)