Waihangahia tētahi putanga matatini ake o tēnei rerenga Ko te Liberty Challenge he whakataetae Indy Pro Series i tū i runga i te ara i Indianapolis.
Ko te tikanga, ko te putanga matatini ake o te rerenga ko "Ko te Liberty Challenge he whakataetae Indy Pro Series i tu i runga i te ara ara i Indianapolis, mai i te 2005 ki te 2007, hei whakataetae tautoko ki te US Grand Prix. "