A U.S. Air Force B-52 Stratofortress approaches a KC-135 Stratotanker from the 100th Air Refueling Wing, RAF Mildenhall, England, before receiving fuel over Romania Sept. 13, 2018. Training with NATO allies such Romania improves interoperability and demonstrates the United States’ commitment to regional security. (U.S. Air Force photo by Tech. Sgt. Emerson Nuñez)