Darryl Hodge, 733rd Logistics Readiness Squadron fuels facilities fuels distribution systems operator, takes a fuel sample at Joint Base Langley-Eustis, Va., April 10, 2017. In addition to its impact on flightline operations, fuels facilities also ensure government vehicles on base are provided with fuel and buildings are supplied with ground products they many need, including gasoline, standard low sulfur diesel and biodiesel, which is more environmentally friendly. (U.S. Air Force photo/Staff Sgt. Areca T. Bell)