The Environment and the Economy; Chuck Klosterman; What Unites Americans; Murder Mystery on Long Island

Environmentalist Amy Larkin explains why we need to translate the costs of global warming and extreme weather into dollar amounts—and start paying up. Chuck Klosterman talks villains, and what we’re really saying when we call someone bad or evil. Philip Caputo on what he learned while traveling from the United States’ most southern point to its most northern point. And reporter Robert Kolker discusses the murders of women on Long Island who used Craigslist to advertise as escorts, and the investigation to find the killer.