PICTURES OF THE DAY

Exercise rider David Nava takes Kentucky Derby winner and Preakness entry Animal Kingdom (L) back to the barn with assistant trainer David Rock (R) after training at the Fair Hill Training Center on May 17, 2011 in Elkton, Maryland. (Rob Carr/Getty Images)

Groom Noe Lagunas holds Kentucky Derby winner and Preakness entrant Animal Kingdom at the Fair Hill Training Center on May 17, 2011. (Rob Carr/Getty Images)

Kentucky Derby winner Animal Kingdom with David Nava aboard gets a morning gallop at the Fair Hill Training Center on Monday, May 16, 2011 in Fair Hill, Md. Animal Kingdom and his trainer Graham Motion are preparing for the 136th Preakness Stakes race Saturday in Baltimore. (AP Photo/Jim Dietz)

Kentucky Derby winner and Preakness entrant Animal Kingdom grazes after a morning workout at the Fair Hill Training Center on May 17, 2011 in Elkton, Maryland.  (Rob Carr/Getty Images)