away the self-declared caliphate, mosul in iraq and ultimately raqqah in syria. that will major practical and psychological affects on daesh. the campaign for mosul is tough, it's getting into the city, it's getting into block to blockhouse to house fighting, but the iraqi security forces combined with the kurdish peshmerga are doing remarkably well backed by the coalition. we will succeed in taking mosul. >> when? >> i think this is a matter of certainly weeks and perhaps months. i don't want to put a time limit on it. again, as you get to the heart of the city it gets tougher and tougher. >> in the past when the iraqi army has liberated towns from isis it is has run into a problem which is that the soldiers are often shiite on kurdish, the locals are sunnis and after the liberation there is a round of bloodletting or the locals feel that they have been liberated from one occupier