Japan Air Self-Defense Force pararescuemen parachute into the ocean during Exercise Keen Sword 17 Nov. 10, 2016, at Kadena Air Base, Japan. JASDF and 31st Rescue Squadron Pararescuemen conducted a mass casualty exercise, practicing rescuing survivors of an aircraft crash in open ocean. (U.S. Air Force photo by Airman 1st Class Corey M. Pettis)