He is one of the greatest cyclists in American history. He is National Champion, an Olympian and two time Tour de France stage winner. He racked up an incredible 328 pro cycling victories. But shortly after his retirement from the sport, he was hit with a challenge much bigger than any road race. Parkinson's Disease. And for the past 20 years, he has not only fought the fight against Parkinson's. He has won! The remarkable Davis Phinney is my guest this week on Amazing Americans.