Senior Airman Steven Durr, 28th Maintenance Squadron aerospace propulsion journeyman, adjusts a boroscope camera in a General Electric F101-GE-102 turbofan engine at the propulsion flight building on Ellsworth Air Force Base, S.D., Nov. 29, 2011. The small flexible camera is used to inspect the engine interior without removing the outer casing. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)