U.S. Air Force Master Sgt. Joel Bradley, 351st Air Refueling Squadron boom operator, reads an air refueling checklist over the Black Sea, July 22, 2020. The KC-135 Stratotanker assigned to the 100th Air Refueling Wing, flew operations over the Black Sea integrating with assets across all domains demonstrating the ability of U.S. forces to operate with international boundaries in the Black Sea. (U.S. Air Force photo by Senior Airman Eugene Oliver)