"War on the EPA" - Preview

How did Scott Pruitt go from fighting the EPA to running the agency and rolling back years of policy? With access to key players on all sides of the issue -- and with Pruitt now leading the federal agency he sued 14 times as Oklahoma’s attorney general -- "War on the EPA" is an inside look at the triumphant ascent of the anti-regulatory movement in America. Coming to FRONTLINE October 11.