U.S. Air Force Staff Sgt. Brian Emerson, Thunderbird 8, dedicated crew chief, assist IndyCar driver J.R. Hildebrand with his flight harness in preparation for his Thunderbird F-16 Fighting Falcon at Nellis Air Force Base, Nev., Oct. 11, 2011. Hildebrand, who drives the number four National Guard car for Panther Racing will be competing in the IZOD IndyCar World Championship at the Las Vegas Motor Speedway.