Racing Photo Gallery

** FILE ** In this May 20, 2006, file photo, Barbaro is steadied a track worker as jockey Edgar Prado looks on after he pulled up the horse with a fractured right rear leg during the 131st running of the Preakness Stakes horse race at Pimlico Race Course in Baltimore. Barbaro, who won the Kentucky Derby in 2006, broke down in the Preakness and was euthanized with laminitis several months later after a gallant effort to save him. Despite the regularity of such breakdowns and the money involved in the sport, no one is certain how many horses are lethally injected on the nation's tracks each year. (AP Photo/Garry Jones, File)