Jeff Jenkins, barge captain, opens a fuel tank so that the Airmen from 733rd Logistics Readiness Squadron fuel laboratory can run tests, at Joint Base Langley-Eustis, Virginia, March 23, 2018. The LRS Airmen must test the fuel to check if it contains any water before they can begin pumping. (U.S. Air Force photo by Airman 1st Class Tristan Biese)