Senior Airman Nickolauss Guier, a 386th Expeditionary Logistics Readiness Squadron fuels systems journeyman, looks through a refractometer while conducting a Fuel System Icing Inhibitor test at an undisclosed location in Southwest Asia, Dec. 1, 2015. The POL flight is responsible for providing fuel to all aircraft, and ground equipment for U.S. and coalition forces on base in support of Operation INHERENT RESOLVE. (U.S. Air Force photo by Staff Sgt. Jerilyn Quintanilla)