SCCA - NewsFORT RILEY, Kan. (July 22, 2014) - Sgt. Hubert Jefferson gripped his black suede-covered steering wheel, revved up his 426-horsepower engine and released the clutch. The result was the earsplitting sound of screeching tires against the airfield's tarmac.He and 11 other Soldiers raced in the Salina Region Sports...