A French air force KC-135 Stratotanker, refuels a U.S. Air Force B-52 Stratofortress over Europe, Sept. 25, 2017. The Stratofortress is deployed from Barksdale Air Force Base, La., to RAF Fairford, England, in support of bomber assurance and deterrence operations. (U.S. Air Force photo by Tech. Sgt. Joshua J. Garcia)