Why a NASCAR champ calls Richard Petty 'the greatest race car driver that ever lived'

In more than 20 years in NASCAR, Brad Keselowski had never spent any significant time with Richard Petty until they traveled together April 7 to Washington, D.C., to visit with Congressional members of the National Motorsports Coalition.The time with Petty was eye-opening for Keselowski, who quizzed the seven-time Cup champion about his life and career.Keselowski explains what the time with Petty meant to him and why he calls Petty — who is tied with Dale Earnhardt and Jimmie Johnson for t