Staff Sgt. Lisa Davis, a crew chief with the 315th Aircraft Maintenance Squadron, poses with Col. Timothy Wrighton, 315th commander, and Chief Master Sgt. Benson Futrell, 315th command chief, Charleston Air Force Base, S.C., on the flight line at Al Udeid, Qatar, on Christmas morning. SSgt Davis’s civilian job is a school nurse, but instead of pursuing a medical career in the Reserves she chose to become a maintainer for the C-17.