Senior Airmen Erica Plymale and Angelique Hasz tighten bolts on a B-1B Lancer aircraft engine.
U.S. Air Force Senior Airmen Erica Plymale (left) and Angelique Hasz, 28th Maintenance Squadron aerospace propulsion journeymen, tighten bolts on a B-1B Lancer aircraft engine at Ellsworth Air Force Base, S.D., on March 11, 2010.