OVER THE CENTRAL UNITED STATES -- A B-2 Spirit crew from the 509th Bomb Wing at Whiteman Air Force Base, Mo., prepares for refueling by a KC-135R Stratotanker from the 319th Air Refueling Wing at Grand Forks AFB, N.D. The air refueling effort was part of a training mission. (U.S. Air Force photo by Staff Sgt. Scott T. Sturkol)
