Why do race car drivers (most) have big noses?

Just watching the Indy 500 parade now on TV and seems many have big noses, why is this? Yes Danica Patrick has a small nose, but most were very large, Tony Kanan for example. Don't believe me, watch tomorrow on TV, Indy 500. And check out the F-1 drivers, wow. Not that I am a "Nose-guy", not that way, but just observant.