Staff Sgts. Dan Durbin (left) and Jason Johnson install a new front tire on a C-40C on a sweltering afternoon at Scott Air Force Base, Ill. Durbin and Johnson are reservists assigned to the 932nd Maintenance Squadron. The 932nd Airlift Wing is only Air Force Reserve unit that flies the C-40C. (U.S. Air Force photo/Tech. Sgt. Dan Oliver)