OFFUTT AIR FORCE BASE, Neb. -- Airman 1st Class Edward Damhuis, a fuels labratory technician with the 55th Maintenance Squadron's Fuels Management Flight, looks through a refractometer to determine if the fuels systems icing inhibitor, or FSII, level is within standards, March 1. (U.S. Air Force photo/Josh Plueger)

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Photo by: Josh Plueger |  VIRIN: 100301-F-7797P-004.JPG