A Romanian Air Force F-16 prepares to recive fuel from a KC-135 Stratotanker from the 100th Air Refueling Wing, RAF Mildenhall, England, 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)