Dan Marcotte raced his first stock car at age 16. Since then, he’s been passionate not just about racing, but about building his own car that can go super fast. He’s now built a "land speed car." And today, he heads out to the Bonneville Salt Flats to see if his homemade car can break his personal record: 279.6 miles per hour. Also: a brush with fame, meeting Pete Seeger.