The Indianapolis 500 celebrates 100 years of competition Sunday. From the first winner, American Ray Harroun in something called a Marmon "Wasp," to the latest, Englishman Dario Franchitti, the Indy 500 has become the most famous race in the world. This year, observers say it boasts the strongest 33-car field it has seen since the CART-Indy split in 1996. It’s a regular stop for the Izod IndyCar Series drivers, but the race also includes former champions and non-IndyCar regulars who are in a ride for one shot at glory at The Brickyard.