U.S. Air Force Staff Sgt. Brian Emerson, Thunderbird No. 8 dedicated crew chief, assists J.R. Hildebrand, IndyCar driver, with his flight harness in preparation for his Thunderbird F-16 Fighting Falcon flight Oct. 11, 2011, at Nellis Air Force Base, Nev. Hildebrand, driver of the No. 4 National Guard car for Panther Racing, came to Las Vegas to compete in the IZOD IndyCar World Championship at the Las Vegas Motor Speedway. (U.S. Air Force photo by Staff Sgt. Larry E. Reid Jr./Released)