Staff Sgt. Gregory House, a quality assurance inspector with the 437th Maintenance Group, looks on as Staff Sgt. Timothy Womble, an aerospace ground equipment technician with the 437th Maintenance Squadron, refuels a generator during a rainy night at Joint Base Charleston, S.C., Feb. 9, 2015. Many units assigned to the 437th Airlift Wing work around the clock, no matter the weather, to ensure the mission gets done. (U.S. Air Force photo/Tech. Sgt. Renae Pittman)

Senior Airman Zachary Elkins, a crew chief with the 437th Aircraft Maintenance Squadron, monitors the maintenance panel of a C-17 Globemaster III during refueling at Joint Base Charleston, S.C., Feb. 9, 2015. Elkins belongs to the gold aircraft maintenance unit and works the swing shift, from 3 p.m. to 11 p.m. (U.S. Air Force photo/Tech. Sgt. Renae Pittman)

Senior Airman Eric Lydic, a fuels technician with the 628th Logistics Readiness Squadron, monitors pressure gauges during a refueling operation at Joint Base Charleston, S.C., Feb. 9, 2015. The fuels section is one of multiple units on base that work around the clock, no matter the weather, to ensure the mission accomplishment. (U.S. Air Force photo/Tech. Sgt. Renae Pittman)

Airman 1st Class Cornelius Grant, a crew chief with the 437th Aircraft Maintenance Squadron, opens the cargo ramp door to troubleshoot problems with the nose strut of the C-17 Globemaster III at Joint Base Charleston, S.C., Feb. 9, 2015. Grant maintains aircraft structures, systems, components, and support equipment--all while working swing shift. Swing shift for Grant lasts from 3 p.m. to 11 p.m. (U.S. Air Force photo/Tech. Sgt. Renae Pittman)

Paul Mansfield, an aerospace ground equipment technician with the 437th Maintenance Squadron, repairs electrical plugs on an essex generator at Joint Base Charleston, S.C., Feb. 9, 2015. The majority of the 437 MXS works around the clock to ensure mission success. (U.S. Air Force photo/Tech. Sgt. Renae Pittman)