A KC-135 Stratotanker from Fairchild Air Force Base refuels a B-1B Lancer during a training exercise Sept. 23, 2014, over South Dakota. For more than 50 years the KC-135 has provided the core aerial refueling capability for the Air Force. The aircraft can travel up to 1,500 miles with 150,000 pounds of transfer fuel, which enables the Air Force to project rapid, flexible military power. The B-1B is assigned to Ellsworth Air Force Base, South Dakota. (U.S. Air Force photo by Senior Airman Mary O'Dell)