humvees rescue him and they hunt on. an isis fighter pops up from a tunnel, shoots. and he blows himself up. a tenacity and desire to die that will surely slow and bloody the fight ahead. erin, what does this mean for the fight ahead? well, there had been some optimism that maybe the broad, deserted plain you saw around mosul wouldn't be fought for so hard by isis. they clearly left people as you saw there willing to die to slow down the advance of coalition and iraqi forces. that may mean the fight for the urban sprawl of mosul which is densely populated, 1.2 million people potentially trapped in there say aid agencies, well, that fight could be bloodier and messier than previously thought. we could be in for a months'-long trauma here for these people who have already lived under years of isis control, erin.