A U.S. Air Force KC-135 Stratotanker assigned to the 100th Air Refueling Wing refuels a U.S. Air Force F-16C Fighting Falcon during exercise Astral Knight 21 over the Adriatic Sea, May 18, 2021. Participation in multinational exercises enhances our professional relationships and improves overall coordination with allies and partner militaries during times of crisis. (U.S. Air Force photo by Staff Sgt. Izabella Workman)