arthur herman discusses his book "joseph mccarthy." professor herman reassesses cart these legacy and argues the senator from wisconsin was justified in arguing there was a real communist threat inside the u.s. government. this is about an hour. c-span: arthur herman, author of "joseph mccarthy," why do you think we needed to re-examine the life and legacy of america's most-hated senator? >> guest: well, there are a couple of reasons. one is that we now know a lot more about the times and the context in which mccarthy had his political career and built his career of notoriety. we also know a lot more about joe mccarthy, the man, and about his own life. and what i wanted to do was to really put it together in a book that would give people a broad introduction, both to the period, but also to joe mccarthy, the man; to understand who he was, why he has the kind of tremendous re--reputation and notoriety that he does and to understand where that came from, what the origins of it were and maybe to sort of rethink just what we really do--h--