A U.S Air Force B-2 Spirit aircraft approaches the refueling boom of a KC-135R Stratotanker. A U.S Air Force B-2 Spirit aircraft approaches the refueling boom of a KC-135R Stratotanker aircraft during an inflight refueling mission over the Midwest on Feb. 4, 2008. The Stratotanker is attached to the 319th Air Refueling Wing out of Grand Forks Air Force Base, N.D. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 242800-U-PXJ43-686.jpg Photo Gallery