Fueling the Fight
A fuels laboratory technician assigned to the 1st Special Operations Wing examines a fuel sample using the refractometer at Hurlburt Field, Florida, Aug. 7, 2025. The technician places the fuel and water mixture on the refractometer, which uses light refraction through the water to produce a reading for fuels system icing inhibitor, which prevents water in the fuel from freezing at high altitudes. (U.S. Air Force photo by Staff Sgt. Jason Huddleston)