Dixon and Rahal win Iowa Heat races

Scott Dixon and Graham Rahal won Saturday's IndyCar heat races at Iowa Speedway. Takuma Sato finished second to Dixon in Heat 1, while Ed Carpenter surrendered the lead to Rahal with 5 laps remaining in Heat 2 and finished second. All 4 will advance to Heat 3, which will determine the top-10 grid positions for tomorrow's Iowa Corn Indy 250. Helio Castroneves will start on pole for Heat 3, scheduled to begin shortly.

Brian C. reporting from Iowa