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Horses walk around the stable as the sun rises over Churchill Downs in Louisville, Kentucky, on Friday, May 3 during morning workouts for the 2013 Kentucky Derby.
Horses walk around the stable as the sun rises over Churchill Downs in Louisville, Kentucky, on Friday, May 3 during morning workouts for the 2013 Kentucky Derby.

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    History could be made at Kentucky Derby

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History could be made at Kentucky Derby

It's one of the biggest events for horse racing fans. CNN's Richard Roth has more.

History could be made at Kentucky Derby

It's one of the biggest events for horse racing fans. CNN's Richard Roth has more.