Todd S. Purdum, veteran journalist and author of the new book "Desi Arnaz: The Man Who Invented Television," explains how a Cuban refugee revolutionized Hollywood from his adopted home in Los Angeles. Though underappreciated as a showbiz entrepreneur, Arnaz pioneered the three-camera sitcom format, shifted television production from New York to Los Angeles, and created the business model that would sustain the industry and TV production for seven decades.