ELLSWORTH AIR FORCE BASE, S.D. - Airmen 1st Class Adam Reinert, 28th Maintenance Squadron aerospace propulsion apprentice, inspects a B-1B Lancer engine for possible broken safety wires and missing parts, April 9. The 28 MXS services 29 B-1s from two bomb squadrons. (U.S. Air Force photo/Senior Airman Marc I. Lane)