The famous Churchill Downs racetrack in Louisville, Ky., hosts one of the biggest horse races in the world.
The Kentucky Derby: The 138th Run for the Roses
The famous Churchill Downs racetrack in Louisville, Ky., hosts one of the biggest horse races in the world.
Matt Slocum / AP
Spectators congregate in the infield at Churchill Downs before running of the 138th Kentucky Derby horse race Saturday, May 5, 2012, in Louisville, Ky.