Refueling U.S. Air Force Tech. Sgt. Thomas Ireland keeps fuel flowing into a B-52 Stratofortress over Afghanistan during a close-air-support mission, Feb. 9, 2006. The KC-135 Stratotanker transfers fuel at about 16 gallons per second. The bomber is from the 2nd Bomb Wing at Barksdale Air Force Base, La. SHARE: Download: Full Size (0.1 MB) Credit: VIRIN: 546691-S-EVI64-220.jpg Photo Gallery