Mepụta nsụgharị dị mgbagwoju anya nke ahịrịokwu a Ihe ịma aka Liberty bụ asọmpi Indy Pro Series nke a na-eme n'okporo ụzọ na Indianapolis.
N'ezie, nsụgharị dị mgbagwoju anya nke ahịrịokwu ahụ bụ "The Liberty Challenge bụ agbụrụ Indy Pro Series nke a na-eme n'okporo ụzọ na Indianapolis, site na 2005 ruo 2007, dị ka agbụrụ nkwado na US Grand Prix. "