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Andretti Autosport driver James Hinchcliffe of Canada climbs into his race car surrounded by crew members during a practice session at the Indianapolis Motor Speedway in Indianapolis, Indiana May 16, 2013. The 97th running of the Indianapolis 500 is scheduled for May 26. REUTERS/Brent Smith ( MOTOR-RACING-INDY )

Team Penske driver Will Power of Australia smiles from behind his driving helmet during a practice session at the Indianapolis Motor Speedway in Indianapolis, Indiana May 16, 2013. The 97th running of the Indianapolis 500 is scheduled for May 26. REUTERS/Pat Cocciadiferro ( MOTOR-RACING-INDY )

Ryan Briscoe, of Australia, pulls out of the pit area during practice for the Indianapolis 500 auto race at the Indianapolis Motor Speedway in Indianapolis, Thursday, May 16, 2013. (AP Photo/Darron Cummings) ( IndyCar Indy 500 Auto Racing )

Ed Carpenter Racing driver Ed Carpenter of the U.S. stands with his foot on the pit wall during a practice session at the Indianapolis Motor Speedway in Indianapolis, Indiana May 16, 2013. The 97th running of the Indianapolis 500 is scheduled for May 26. REUTERS/Brent Smith ( MOTOR-RACING-INDY )

Takuma Sato, of Japan, is reflected in the mirror of his car during a break in practice for the Indianapolis 500 auto race at the Indianapolis Motor Speedway in Indianapolis, Thursday, May 16, 2013. (AP Photo/Darron Cummings) ( IndyCar Indy 500 Auto Racing )

Ryan Briscoe, of Australia, checks the scoring monitors as he waits to practice for the Indianapolis 500 auto race at the Indianapolis Motor Speedway in Indianapolis, Thursday, May 16, 2013. (AP Photo/Darron Cummings) ( IndyCar Indy 500 Auto Racing )

A car drives by as the crew of Scott Dixon, of New Zealand, practices a pit stop during practice for the Indianapolis 500 auto race at the Indianapolis Motor Speedway in Indianapolis, Thursday, May 16, 2013. (AP Photo/Darron Cummings) ( IndyCar Indy 500 Auto Racing )

Helio Castroneves, of Brazil, prepares to drive during practice for the Indianapolis 500 auto race at the Indianapolis Motor Speedway in Indianapolis, Thursday, May 16, 2013. (AP Photo/Michael Conroy) ( IndyCar Indy 500 Auto Racing )

Andretti Autosport owner Michael Andretti smiles while in his team's timing and scoring stand during a practice session at the Indianapolis Motor Speedway in Indianapolis, Indiana May 16, 2013. The 97th running of the Indianapolis 500 is scheduled for May 26. REUTERS/Pat Cocciadiferro ( MOTOR-RACING-INDY )

Dario Franchitti, of Scotland, stretches before climbing into his car during practice for the Indianapolis 500 auto race at the Indianapolis Motor Speedway in Indianapolis, Thursday, May 16, 2013. (AP Photo/Darron Cummings) ( IndyCar Indy 500 Auto Racing )

A.J. Foyt Enterprises driver Takuma Sato of Japan sits in his car while his crew puts fuel in the tank during a practice session at the Indianapolis Motor Speedway in Indianapolis, Indiana May 16, 2013. The 97th running of the Indianapolis 500 is scheduled for May 26. REUTERS/Brent Smith ( MOTOR-RACING-INDY )

Sarah Fisher Hartman Racing driver Josef Newgarden of the U.S. wears a small, portable video camera strapped to his pits as he walks in the pit lane during a practice session at the Indianapolis Motor Speedway in Indianapolis, Indiana May 16, 2013. The 97th running of the Indianapolis 500 is scheduled for May 26. REUTERS/Brent Smith ( MOTOR-RACING-INDY )

Andretti Autosport driver Carlos Munoz (R) of Colombia walks toward his race car during a practice session at the Indianapolis Motor Speedway in Indianapolis, Indiana May 16, 2013. The 97th running of the Indianapolis 500 is scheduled for May 26. REUTERS/Brent Smith ( MOTOR-RACING-INDY )

Ed Carpenter sits in his car under the shade of an umbrella during practice for the Indianapolis 500 auto race at the Indianapolis Motor Speedway in Indianapolis, Thursday, May 16, 2013. (AP Photo/Darron Cummings) ( IndyCar Indy 500 Auto Racing )

Schmidt-Hamilton Motorsports driver Simon Pagenaud of France races down the pit lane during a practice session at the Indianapolis Motor Speedway in Indianapolis, Indiana May 16, 2013. The 97th running of the Indianapolis 500 is scheduled for May 26. REUTERS/Brent Smith ( MOTOR-RACING-INDY )

Panther DRR driver Oriol Servia (R) of Spain talks with a crew member in the pit lane during a practice session at the Indianapolis Motor Speedway in Indianapolis, Indiana May 16, 2013. The 97th running of the Indianapolis 500 is scheduled for May 26. REUTERS/Brent Smith ( MOTOR-RACING-INDY )

Josef Newgarden dons his helmet as he prepares to drive during practice for the Indianapolis 500 auto race at the Indianapolis Motor Speedway in Indianapolis, Thursday, May 16, 2013. (AP Photo/Darron Cummings) ( IndyCar Indy 500 Auto Racing )

Will Power, of Australia, looks down the pit lane after driving during practice for the Indianapolis 500 auto race at the Indianapolis Motor Speedway in Indianapolis, Thursday, May 16, 2013. (AP Photo/Michael Conroy) ( IndyCar Indy 500 Auto Racing )

The car driven by Conor Daly hits the wall in the first during practice for the Indianapolis 500 auto race at the Indianapolis Motor Speedway in Indianapolis, Thursday, May 16, 2013. Daly was not injured. (AP Photo/Joe Watts) ( IndyCar Indy 500 Auto Racing )