Marco Andretti prepares his helmet before the start of practice for the Indianapolis 500 IndyCar auto race at the Indianapolis Motor Speedway in Indianapolis, Monday, May 19, 2014. (AP Photo/Michael Conroy)
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Marco Andretti prepares his helmet before the start of practice for the Indianapolis 500 IndyCar auto race at the Indianapolis Motor Speedway in Indianapolis, Monday, May 19, 2014. (AP Photo/Michael Conroy)
