Airman 1st Class Alexander McCall performs an inspection looking for discrepancies on top of a C-17 on the flightline at Charleston Air Force Base, S.C. Nov. 4. In addition to scheduled and non-scheduled maintenance, inspections are a requirement for all C-17 aircraft to ensure operational integrity during flight. Airman McCall is a crew chief with the 315th Aircraft Maintenance Squadron. (U.S. Air Force photo/James Bowman)