Next secretary of defense. smart on nukes, tough on iran. will have to fire a four-star for credibility. what do you mean by that? >> he's been the number two under two defense secretaries. he's had to work with all the combatant commander, everyones in the system, massage the system, if you will. his job hasn't been someone who's had to really, you know, shake heads, you know, jostle the generals around. and i think at a time where we're facing challenges with isis, we've had a lot of interesting kind of tough friction with vladimir putin in russia, china is a complication, hagel acquiesced t...