A KC-135 Stratotanker sits on the flight line Oct. 02, 2019, at Kadena Air Base, Japan. Boom operators on a KC-135 have the ability to pump thousands of pounds of fuel to any capable aircraft, thousands of feet above the ground, flying at 230 miles per hour, while only 47 feet from the receiving aircraft. (U.S. Air Force photo by Senior Airman Cynthia Belío)