Col. Gentry Boswell, 28th Bomb Wing commander, undergoes training in a weapons systems trainer, or simulator, at the Mission Training Center at Ellsworth Air Force Base, S.D., Feb. 19, 2016. Thanks to the Sustainment Block 16 updated simulator, Ellsworth Airmen are able to train for the incoming upgraded B-1s, saving Ellsworth aircrew time and the Air Force money. (U.S. Air Force photo by Airman Donald C. Knechtel/Released)