A U.S. Air Force KC-135 Stratotanker refuels a Hellenic air force F-16C Fighting Falcon Oct. 26, 2017, over the Mediterranean Sea. This refueling was in support of a training exercise among the two countries. The 100th Air Refueling Wing operated from Athens, Greece, for the first time. (U.S. Air Force photo by Senior Airman Tenley Long)