what can you tell us? >> well, we have been hearing fighter jets overhead. we've been hearing what sounds like artillery in the distance at this stage. the troop morale, whether the peshmerga or iraqi army we've been speaking to over the course of the last 24 hours are fairly confident at this stage. they do acknowledge it is potentially going to be a very long and difficult battle. one that they have been preparing for. but they do feel at the end of the day, ultimately they will be able to recapture the strategic city of mosul from isis. but they don't necessarily know exactly what to expect, poppy. you were hearing ben describing some of the activity that isis has been undergoing, such as the underground tunnel complex that is being dug. they're also anticipating similar isis tactics that they've been seeing in the past. such as booby trapped homes,