Janet Stewart tests for the concentration of fuel system icing inhibitor in a sample of commercial Jet A fuel in the Aerospace Fuels Laboratory at Wright-Patterson Air Force Base, Ohio. Air Force Petroleum Agency and Air Force Research Laboratory researchers are partnering on an initiative to evaluate the use of commercial jet fuel in place of military standard JP-8 fuel. Mrs. Stewart is a fuels quality assurance specialist with the Aerospace Fuels Laboratory at Wright-Patterson Air Force Base, Ohio. (U.S. Air Force photo/Derek Kaufman)