THE LUCKY THIRTEEN: The Winners of America's Triple Crown of Horse Racing

In more than a century of American Thoroughbred racing, only thirteen horses have won the Triple Crown. From the first winner, Sir Barton in 1919, to the thirteenth, Justify, the author covers the trainers, owners, and jockeys who etched their names in Thoroughbred racing, and the "lucky thirteen" who captured all three jewels of the Triple Crown. Photos.