A KC-135 Stratotanker assigned to the Michigan Air National Guard’s 171st Air Refueling Squadron refuels a B-1 bomber from the 28th Bomb Wing at Ellsworth Air Force Base, S.D., April 1, 2016. The KC-135 provides the core aerial refueling capability for long range strike assets like the B-1. (U.S. Air Force photo by Senior Airman Rebecca Imwalle/Released)