U.S. Air Force Staff Sgt. Benjamin Moore, 733rd Logistics Readiness Squadron fuels facilities supervisor, walks on a dyke in the fuels storage tank farm at Joint Base Langley-Eustis, Va., April 7, 2017. Fuels facilities also receives and stores ground products, such as gasoline, standard low sulfur diesel and biodiesel, which is more environmentally friendly. (U.S. Air Force photo/Staff Sgt. Areca T. Bell)