ELLSWORTH AIR FORCE BASE, S.D. - (Left) Airmen 1st Class Benjamen Lundy and Robert Cadreau verify the progress of maintenance of a B-1B Lancer engine, April 9. Airmen Lundy and Cadreau are both aerospace propulsion technicians assigned to the 28th Maintenance Squadron. (U.S. Air Force photo/Senior Airman Marc I. Lane)