Fans wear white sunglasses in memory of Dan Wheldon, two time winner of the Indianapolis 500, at the Indianapolis Motor Speedway.

Dario Franchitti, three time winner of the Indianapolis 500 at the Indianapolis Motor Speedway.

2012 Indianapolis 500 at the Indianapolis Motor Speedway.

Indianapolis Motor Speedway.

Indianapolis Motor Speedway.

Indianapolis 500 - Indianapolis Motor Speedway

Indianapolis Motor Speedway , In.

The 1932 Indianapolis 500 - Indianapolis 500 - Indianapolis Motor Speedway

Dan Wheldon posed with the Borg-Warner Trophy on the Indianapolis Motor Speedway track the day after winning the 2011 Indianapolis 500.

Drivers in the Indianapolis 500.

Dan Wheldon memorialized on this year's Indianapolis 500 ticket.

Indianapolis Motor Speedway yard of bricks

Indianapolis Motor Speedway.

Tony Kanaan, of Brazil, celebrates after winning the Indianapolis 500 auto race at the Indianapolis Motor Speedway in Indianapolis, Sunday, May 26, 2013. (AP Photo/Darron Cummings)

Indianapolis 500 Fans

Good memories of Wheldon carry Herta through month of May - Indianapolis 500 - Indianapolis Motor Speedway you are in my heart

William Rast car in memory of Dan Wheldon at the Indianapolis Motor Speedway. Bryan Herta Autosport, Dan Wheldon by IZOD Ind..

May 19, 2012; Indianapolis, IN, USA; IndyCar owner Sarah Fisher holds her daughter Zoe during qualifications for the Indianapolis 500 at the Indianapolis Motor Speedway. Mandatory Credit: Brian Spurlock-US PRESSWIRE #Indycar

Indianapolis Motor Speedway - Indianapolis, IN

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Indianapolis Motor Speedway - Indianapolis, IN