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Formula One is immensely popular throughout much of the world but it has failed to find a big audience in the U.S. It's been dwarfed by the homegrown culture of NASCAR and the Indy 500. Mario Andretti wants to change that. He won the Formula One World Championship in 1978. At 72, he's become the face of Formula One in its latest attempt to find a fan base in the U.S. Morning Edition's Steve Inskeep talked with the racing legend.