Senior Airman Derrick Gentner, 92nd Maintenance Group aircraft hydraulic systems specialist, shows retired Chief Master Sgt. of the Air Force James McCoy a refueling boom his shop is currently repairing Nov. 12, 2014, on Fairchild Air Force Base, Wash. Gentner explained how this boom is used to perform aerial refueling. (U.S. Air Force photo/Airman 1st Class Taylor Bourgeous)
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