We catch up with defending Indy Car champion Dario Franchitti as he prepares for the Rolex 24 at Daytona. He talks about land speed records and the craziness of the people who compete for them.  What's Dario think about confronting a fear?  Franchitti also talks about his admiration for five-time NASCAR champion Jimmie Johnson. A champions talks about how hard is to be a champion and the fun that's possible for both. Enjoy…