CIA Director: ISIS Terrorist Attempt 'Inevitable'

Brian Todd reports on CIA Director Brennan's chilling warning about expected ISIS attempts to attack inside the U.S.

JOHN BRENNAN: I'm expecting them to try to put in place the operatives, the materiel, whatever else they need to do, or to incite people to carry out these attacks. So I believe their attempts are inevitable. I don't think their successes necessarily are.