PICTURES OF THE DAY

On Saturday more than 30,000 flocked to Morphettville racecourse in Adelaide to watch Black Caviar register her 20th consecutive win. (AAP Photo)

Dullahan, held by Yolanda Cordoso and groomed by Cesar Abrego, is bathed after the morning exercise session in preparation for the 138th Kentucky Derby at Churchill Downs on April 29, 2012 in Louisville, Kentucky. (Photo by Matthew Stockman/Getty Images)

Roger J. Weiss’ Hudson Steele was content to travel in third, then charged by the pacesetters and powered away to a victory in Saturday’s feature at Pimlico Race Course, the $75,000 Henry S. Clark Stakes. Chris DeCarlo was on board the winner for trainer Todd Pletcher.  (Jim McCue/Maryland Jockey Club)

Trinniberg on April 29, 2012 in Louisville, Kentucky. (Matthew Stockman/Getty Images)

And Why Not is riden by Peter Brette during the morning exercise session in preparation for the 138th Kentucky Oaks at Churchill Downs on April 28, 2012 in Louisville, Kentucky. (Photo by Matthew Stockman/Getty Images)

Groom Geraldo Morales washes Kentucky Derby hopeful Daddy Nose Best after a morning workout at Churchill Downs in Louisville, Ky., Monday, April 30, 2012. The Kentucky Derby horse race is scheduled for Saturday, May 5. (AP Photo/Charlie Riedel)

Optimizer gallops on April 29, 2012 in Louisville, Kentucky. (Matthew Stockman/Getty Images)

Quiet Oasis and jockey Mario Gutierrez, second from left, hold off Nereid and jockey Mike Smith, left, Antares World and jockey Kevin Krigger and Briecat and jockey Joseph Talamo, right, to win the Grade III, $100,000 Wilshire Handicap horse race, Sunday, April 29, 2012, at Betfair Hollywood Park in Inglewood Calif. (AP Photo/Benoit Photo)

To Honor and Serve capturing The Westchester Grade III at Aqueduct, New York, Saturday, April 28, 2012. (AP Photo/New York Racing Association)

Unusual Heatwave and jockey Rafael Bejarano, left, overpower Stoney Fleece and jockey Joel Rosario to win the $300,000 Snow Chief Stakes horse race, Saturday, April 28, 2012, at Betfair Hollywood Park in Inglewood, Calif. (AP Photo/Benoit Photo)

Utopian and jockey Mike Smith are guided to the winner’s circle after their victory in the Grade III, $100,000 Inglewood Handicap horse race, Friday, April 27, 2012, at Betfair Hollywood Park in Inglewood, Calif. (AP Photo/Benoit Photo)

Assistant trainer John Cisneros gallops Kentucky Derby hopeful Creative Cause at Churchill Downs in Louisville, Ky., Monday, April 30, 2012. (AP Photo/Garry Jones)

Kentucky Derby hopeful I’ll Have Another gallops at Churchill Downs in Louisville, Ky., Monday, April 30, 2012, under exercise rider Johnny Garcia. (AP Photo/Garry Jones)

Union Rags is riden by Julien Laparoux during the morning exercise session in preparation for the 138th Kentucky Derby at Churchill Downs on April 28, 2012 in Louisville, Kentucky. (Matthew Stockman/Getty Images)

Willa B Awesome and jockey Martin Pedroza, left, overtaking Starry Skies (Joel Rosario), right, to win the $300,000 Melair Stakes, Saturday, April 28, 2012 at Betfair Hollywood Park,Inglewood Calif. (AP Photo/Benoit Photo)