Concerts turbocharge U.S. interest in F1

AUSTIN (KXAN) — Bobby Epstein is busy. Standing on pit road at Circuit of the Americas, he types a message on his phone, trying to hurry so we can start our interview.
“I’m sorry,” he says as steps into place for the interview.
I told him not to worry — no doubt he is busy with the Formula One U.S. Grand Prix coming to his track this week. He told me he was actually taking care of business for another event at the track later this year. F1 might be the biggest racin