He was always destined to be a champion. Royally bred, with English and American classic winners in his pedigree, Sir Barton shone from birth, dubbed the "king of them all." But after a winless two-year-old season and a near-fatal illness, uncertainty clouded the start of Sir Barton's three-year-old season. Then his surprise victory in America's signature race, the Kentucky Derby, started him on the road to history, where he would go on to dominate...