The Indy Racing League (IRL) is an American-based open-wheel auto racing sanctioning body. The League sanctions three racing series. The premier IZOD IndyCar Series (ICS), the two developmental series; Firestone Indy Lights and the U.S. F2000 National Championship. ICS is sometimes considered the same as the Indy Racing League. The Indy Racing League's centerpiece race is the Indianapolis 500.