Story : “Toxic Town” visits Anniston, Alabama, one of the most toxic towns in America. “Sir David Attenborough” interviews the famous documentary director. “Depressed and on Welfare” looks at how clinical depression may be keeping some welfare recipients out of the work force. “Cheaters” examines how cheating has become a serious problem on college campuses. “Andy Rooney” talks about how it is sometimes difficult to open packaging.