140930-F-HF922-071
A U.S. Air Force crew chief with the 437th Aircraft Maintenance Squadron, performs a basic post-flight operation, top of the wing inspection, on a C-17 Globemaster III, at Joint Base Charleston, S.C., Sept. 30, 2014. Post-flight operations are conducted to detect any problems with the aircraft to prevent mishaps. (U.S. Air Force photo by Senior Airman Sandra Welch/Released)