Randy Mack, a B-1 simulator maintenance technician, works on a piece of computer equipment at Ellsworth Air Force Base, S.D., Aug. 21, 2018. The B-1 simulator is a state-of-the-art facility, which is powered by multiple computers so it can display images and allow aircrew members to complete realistic training scenarios. (U.S. Air Force photo by Airman 1st Class Thomas Karol)