Herzog reflects on the curiosity that's fueled his career in the new memoir, Every Man for Himself and God Against All. The filmmaker and writer is drawn to extremes: extreme characters, extreme settings, extreme scenarios. But don't mistake him for a mad man like some of his film subjects: "You have to control what is wild in you. You have to be disciplined. And people think I'm the wild guy out there but I'm a disciplined professional," he tells Terry Gross. Later, Lloyd Schwartz reviews new releases that celebrate the late opera star Maria Callas's singing and acting.