A new superstar appeared on the American sports landscape in the spring of 2006. Barbaro, a three-year-old racehorse, won the Kentucky Derby by the largest margin of victory in sixty years, stirring talk of a possible Triple Crown. But in the opening yards of the Preakness Stakes two weeks later, the magnificent animal suffered a catastrophic leg injury that ended his un-defeated career and left him fighting for his life.One of the world's top jockeys, Edgar Prado rode Barbaro to g...