Senior Airman Justin Williford, a C-5M Super Galaxy crewchief, flips pages in the refueling checklist as JP-8 jet fuel is pumped in to a C-5M on the Dover Air Force Base, Del. flightline on Oct. 2, 2013. Williford wear?s a headset to be able to communicate with crewmembers monitoring the process from the cockpit. (U.S. Air Force photo/Greg L. Davis)
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