I knew I wanted to make a movie about Johnny Cash since '96,...

I knew I wanted to make a movie about Johnny Cash since '96, but my first exposure to Cash was the live Folsom Prison album on my dad's shelf, ... I saw Cash's incredibly ravaged face with a rivulet of sweat running down his cheek on the cover. And when I listened to it, I heard all these men cheering - guys in prison. He's singing about murder and they're all cheering. There's such an incredibly rebellious attitude in that material and such danger that even as a kid it stood out to me.