A B-52 Stratofortress from Barksdale Air Force Base, La., takes fuel from a KC-135 Stratotanker assigned to the 100th Air Refueling Wing at RAF Mildenhall, England, Sept. 18, 2015, in the skies near Spain. The refueling was part of exercise Immediate Response, which included a three-ship formation of KC-135s delivering a total of 180,000 pounds of fuel to the sole bomber. The KC-135 was designed and built during the Cold War specifically to deliver fuel to the B-52. (U.S. Air Force photo/Tech. Sgt. Austin M. May)