Bruce Litton's top fuel dragster sits ready at the starting line, waiting for opponent Curt Eierdam's "Invader" jet dragster to power up at the 2013 Arizona Nitro Jam at Southwestern International Raceway, 12000 S. Houghton Road. The Nitro Jam was Saturday. Litton won both heats against Eierdam. Race fans were able to watch all types of racing vehicles, including top fuel dragsters, nitro funny cars, fuel altereds and jet-powered dragsters. For more information about upcoming events at the raceway go to sirace.com online.