ELLSWORTH AIR FORCE BASE, S.D. – (Center) Staff Sgt. Ricardo Gonzales demonstrates how to inspect honey comb seals on the front compressor of a B-1B Lancer engine to Airmen 1st Class Steven Durr and Jesse Davis (right), March 25. All three Airmen are aerospace propulsion technicians assigned to the 28th Maintenance Squadron. (U.S. Air Force photo/Senior Airman Marc I. Lane)