PICTURES OF THE DAY

Dullahan is riden on the track during the morning excercise session in preparation for the 138th Kentucky Derby at Churchill Downs on May 1, 2012 in Louisville, Kentucky. (Getty Images)

An exercise rider takes Kentucky Derby entrant Optimizer for a workout at Churchill Downs Wednesday, May 2, 2012, in Louisville, Ky. (AP Photo/Morry Gash)

Jockey Julien Leparoux and owner Jamie Wyeth look at Kentucky Derby entrant Union Rags at Churchill Downs Wednesday, May 2, 2012, in Louisville, Ky. (AP Photo/Charlie Riedel)

Done Talking is riden on the track during the morning excercise session in preparation for the 138th Kentucky Derby at Churchill Downs on May 1, 2012 in Louisville, Kentucky. (Matthew Stockman/Getty Images)

Jockey Javier Castellano takes Kentucky Derby entrant Gemologist for a workout at Churchill Downs Wednesday, May 2, 2012, in Louisville, Ky. (AP Photo/Morry Gash)

Jim Crowley riding Dance Company win The British Stallion Studs Supporting British Racing EBF Maiden Fillies’ Stakes at Lingfield racecourse on May 01, 2012 in Lingfield, England. (Alan Crowhurst/Getty Images Europe)

Trainers Todd Pletcher, left to right, Mark Casse and D. Wayne Lucas talk during a morning workout at Churchill Downs Wednesday, May 2, 2012, in Louisville, Ky. (AP Photo/Garry Jones)

Jockey Calvin Boral takes Kentucky Derby entrant Take Charge Indy for a morning workout at Churchill Downs Wednesday, May 2, 2012, in Louisville, Ky. (AP Photo/Morry Gash)