181108-N-VI515-0521 PHILIPPINE SEA (Nov. 8, 2018)The aircraft carrier USS Ronald Reagan (CVN 76), left, and the Japan Maritime Self-Defense Force helicopter destroyer JS Hyuga (DDH 181), right, are underway in formation with 16 other ships from the U.S. Navy and Japan Maritime Self-Defense Force (JMSDF) as aircraft from the U.S. Air Force and Japan Air Self-Defense Force fly overhead in formation during Keen Sword 2019. Keen Sword 2019 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 3rd Class Erwin Jacob V. Miciano/Released)