Charles Kuralt; Robert Harris; Cheetah Conservation; Umberto Eco

Charles Kuralt talks about leaving his job at CBS News to travel the United States for his book "Charles Kuralt's America"; Robert Harris introduces his novel "Enigma," which centers around the breaking of Germany's enigma code during World War II; Laurie Marker-Kraus and Dan Kraus of the Cheetah Conservation Fund describe their efforts to preserve the dwindling populations of cheetahs in the wild; Umberto Eco describes his process writing "The Island of the Day Before."