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Helio Castroneves and Dario Franchitti are testing tire compounds and constructions for Firestone during the two-day test at IMS.

Sep 29, 2009

Photo by Ron McQueeney

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Dario Franchitti and Helio Castroneves tested tires Sept. 29-30 for Firestone at IMS.

Sep 29, 2009

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Helio Castroneves won the Indianapolis 500 in 2001, 2002 and 2009.

Sep 29, 2009

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The Andretti Green Racing team prepares Marco Andretti's car for testing.

Sep 29, 2009

Photo by Ron McQueeney

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Firestone tire testing took place under cloudy skies and temperatures in the 50s on Sept. 29 at IMS.

Sep 29, 2009

Photo by Ron McQueeney

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The Target Chip Ganassi Racing crew at work on Dario Franchitti's car.

Sep 29, 2009

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2007 Indianapolis 500 winner Dario Franchitti checks the controls of his Target Chip Ganassi Racing car before heading out for testing at IMS.

Sep 29, 2009

Photo by Ron McQueeney

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Helio Castroneves tested Sept. 29 in the No. 12 Penske Racing car at IMS.

Sep 29, 2009

Photo by Ron McQueeney

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Penske Racing crew members prepare Helio Castroneves' Dallara/Honda/Firestone for a testing run at IMS.

Sep 29, 2009

Photo by Ron McQueeney

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Dario Franchitti will attempt to earn his second Indianapolis 500 victory in 2010. He won in 2007.

Sep 29, 2009

Photo by Ron McQueeney

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Three-time Indianapolis 500 winner Helio Castroneves

Sep 29, 2009

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Dario Franchitti's helmet features the St. Andrew's Cross from the flag of his native Scotland.

Sep 29, 2009

Photo by Ron McQueeney

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Dario Franchitti, center, talks with Curt Cavin of The Indianapolis Star, left, and John Oreovicz of ESPN.com.

Sep 29, 2009

Photo by Ron McQueeney

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Dario Franchitti is testing tires for Firestone at IMS before trying to win the IndyCar Series championship on Oct. 10 at Homestead-Miami Speedway.

Sep 29, 2009

Photo by Ron McQueeney

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Three-time Indianapolis 500 winner Helio Castroneves meets the press.

Sep 29, 2009

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Dario Franchitti drives through Turn 1 at IMS.

Sep 29, 2009

Photo by Ron McQueeney

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Helio Castroneves will try to become the fourth four-time winner of the Indianapolis 500 in 2010, joining A.J. Foyt, Al Unser and Rick Mears.

Sep 29, 2009

Photo by Ron McQueeney

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The Target Chip Ganassi Racing team prepares Dario Franchitti's car for a testing run.

Sep 29, 2009

Photo by Ron McQueeney

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