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Staff Sgt. Gregory Zielonka collects a sample of JP-8 jet fuel from an R-11 fueling truck as part of a routine quality assurance inspection of the truck’s fuel at Selfridge Air National Guard Base, May 15, 2010. Air Force fuels specialists are charged with routinely inspecting the fuel they provide to ensure that it is both “clean” – that it contains no containments – and that it is “dry” – that it contains no water. (U.S. Air Force photo by Master Sgt. Terry Atwell) (RELEASED)
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