After taking off the wing panels of a KC-135, Airman 1st Class Vincent Williams, 92nd MXS crew chief, uses a power drill to put the panels back together at the Grant County International Airport, Moses Lake, Wash., on Oct. 18, 2011. The panels have lots of small screws, which Williams had to carefully keep count of. If he loses even one screw, the wings can’t be operated until that screw is found and properly inserted. (U.S. Air Force photo/Airman 1st Class Earlandez M. Young)