In the early 1950s, a rising star flickered across millions of black-and-white TV sets. Nick-named 'The Grey Ghost,' Native Dancer was a blue-blood thoroughbred with a taste for drama, courtesy of his come-from-behind running style, and impressive credits: He finished first in 21 of his 22 career starts, his only loss by a nose in the 1953 Kentucky Derby; was named Horse of the Year-twice; and was inducted into the National Museum of Racing's Hall...