“Network” and the changing state of TV news

In the years since the premiere of Paddy Chayefsky’s Oscar-winning satire “Network,” in which TV news anchor Howard Beale became a “mad prophet of the airwaves,” 24-hour cable news operations have taken to heart the movie’s lesson: Success lies in the incitement of anger. “Sunday Morning” special correspondent Ted Koppel talks with Bryan Cranston, starring as Howard Beale in a new Broadway version of “Network”; former TV news executive Dick Wald; cable news veteran Greta Van Susteren; and Carlos Maza, host of the Vox series “Strikethrough,” about the state of TV news today.