A B-52 Stratofortress deployed to RAF Fairford, England from Barksdale Air Force Base, La., performs air refueling with a KC-135 Stratotanker from RAF Mildenhall, England June 11, 2014, over the United Kingdom. The B-52 fuel tank can hold up to 312,197pounds of fuel during the refueling mission. (U.S. Air Force photo by Senior Airman Christine Griffiths/Released)