In this interview, John Carter Cash says his father Johnny Cash believed the song "Hurt" was the story of his life. John Carter Cash is an executive producer of the new documentary, "Johnny Cash: The Redemption of an American Icon," which examines Johnny Cash's Christian faith. "I said, 'Dad, are you sure you want to do this?' I said, 'It's a very dark song.' He said, 'It's true to my life.'" Full interview:    • Johnny Cash’s Christian faith Is ‘wha...