ELLSWORTH AIR FORCE BASE, S.D. -- Airman 1st Class Kymric Walker, 28th Maintenance Squadron aerospace propulsion maintenance apprentice, removes S-pins inside the augmenter flame holder from a B-1B Lancer engine, Feb. 3. While working inside the augmenter flame holder, Airman Walker ensures his eyes are protected by using proper protective equipment. (U.S Air Force photo/Airman 1st Class Anthony Sanchelli)