When it comes to American history, Americans are often on shaky ground. Even politicians can never seem to get straight which text "life, liberty and the pursuit of happiness" appears in, let alone where Mount Rushmore gets its name, or what happens in the Bill of Rights after the fifth amendment. Denise Kiernan, the co-author, with Joseph D'Agnese, of "Stuff Every American Should Know," is trying to help set us straight.