Serving again: Prior POL troops continue to fuel airpower in Afghanistan
Retired U.S. Air Force Tech. Sgt. Jeremy Ybarra, 455th Expeditionary Logistics Readiness Squadron fuels management section, looks through a refractometer at Bagram Airfield, Afghanistan, Aug. 3, 2017. The refractometer is used to test icing inhibitor content levels in the fuel system, which lowers the freezing point of water and allows normal operations in cold temperatures. (U.S. Air Force photo by Staff Sgt. Benjamin Gonsier)