Takuma SatoIndyCar Barber Winner Takuma Sato was back in The Freak Nation Sunday night after a popular win Sunday afternoon. Sato drives for Rahal, Letterman Lanigan Racing and his win came in front of one of his bosses, David Letterman, the former talkshow host. Will Sato have to expect Letterman at the races now to take advantage of that Mojo? It took a bit but Sato was able to talk about more than the mechanics of winning. Listen…