We speak with best-selling author Tom Clavin about his latest book: "The Last Outlaws: The Desperate Final Days of the Dalton Gang." Clavin has written several fascinating books about the Old West (including "Tombstone," "Dodge City," and "Wild Bill.") This one focuses on the waning days of the Old West and an infamous gang that was, in a sense, trying to hold on to an era that was about to vanish.