Helio Castroneves, front, of Brazil leads the pack in turn four during the IndyCar Iowa Corn Indy 250 auto race, Saturday, June 23, 2012, at Iowa Speedway in Newton, Iowa. Pole sitter Dario Franchitti was knocked out of the IndyCar race Saturday night in Iowa after his engine blew out before the green flag dropped. (AP Photo/Matthew Putney)
Helio Castroneves, front, of Brazil leads the pack in turn four during the IndyCar Iowa Corn Indy 250 auto race, Saturday, June 23, 2012, at Iowa Speedway in Newton, Iowa. Pole sitter Dario Franchitti was knocked out of the IndyCar race Saturday night in Iowa after his engine blew out before the green flag dropped. (AP Photo/Matthew Putney)