U.S. Air Force Senior Airman Jeremiah Garfoyle, a fuels laboratory technician assigned to the 733rd Logistics Readiness Squadron, walks a fuel barge at Langley Air Force Base, Va., March 18, 2016. In addition to testing all aircraft fuels, fuels technicians re-fuel all the aircraft on the installation. (U.S. Air Force photo by Airman 1st Class Derek Seifert)