181101-N-FN963-1018 PHILIPPINE SEA (Nov. 1, 2018) Japan Maritime Self-Defense Force (JMSDF) personnel watch flight operations on the flight deck aboard the aircraft carrier USS Ronald Reagan (CVN 76) during Keen Sword 19. Keen Sword is a joint, bilateral field-training exercise involving U.S. military and JMSDF personnel, designed to increase combat readiness and interoperability of the Japan-U.S. alliance. (U.S. Navy photo by Mass Communication Specialist 1st Class Richard L.J. Gourley/Released)