David Sanger; Steve Martin; V.S. Naipaul

David Sanger of The New York Times analyzes the rising tension in the Korean Peninsula after North Korea fired shells at a South Korean island, and he looks at the concerns about the North's burgeoning nuclear program. Actor, musician, and author Steve Martin introduces his first full-length novel, "Object of Beauty," which tells the story of a young artist navigating the art scene in New York City. Nobel Prize-winning author V.S. Naipaul shares his book "The Masque of Africa," which looks at deep-seated belief systems in Africa.