>> when we sanitize history we take those figures to denigrate them and write them out of history will this part of our herridge we're destined to repeat that portion of history. if we write people off simply because their story or certain aspects of their life do not agree with us we run the risk of avoiding some of the same mistakes. brian: every time we identify someone as having made a mistake and because that makes them unworthy then we forget about a lot of people so we would be writing a lot of presidents off, basically all of them out of history. brian: up next al can one of the most revered president in his day be so controversial in our day?