A U.S. Air Force F-16 Fighting Falcon assigned to the 555th Fighter Squadron, Aviano Air Base, Italy, is refueled by a KC-135 Stratotanker assigned to the 100th Air Refueling Wing, RAF Mildenhall, United Kingdom, during a mission over the Black Sea, Jan. 14, 2021. U.S. military operations in the Black Sea enhance regional stability, combined readiness and capability with our NATO allies and partners. (U.S. Air Force photo by Tech. Sgt. Emerson Nuñez)