Racing Photo Gallery

** FILE ** This May 5, 2007 file photo shows Street Sense, third from left, with jockey Calvin Borel aboard, as they round the first turn during the 133rd Kentucky Derby at Churchill Downs in Louisville, Ky. About 40,000 thoroughbreds are born in the United States each year. About 23,000 make it to the race track. Only 20 run in the Kentucky Derby. (AP Photo/Patti Longmire, File)