Zeroing a refractometer

Tech. Sgt. Cameron Buckingham, 23rd Logistics Readiness Squadron fuels flight NCO in charge, zeroes out a refractometer at Moody Air Force Base, Ga., April 27. The refractometer is used to measure fuel system icing inhibitor content in Jet Fuel. (U.S. Air Force photo/Airman 1st Class Douglas Ellis)(RELEASED)

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