>> reporter: it is a struggle to find space on the trucks taking them to camps further north. they're the latest, perhaps the last, to leave the half mile square camp, all that is left of the islamic state. but these are not the ones who claim to be caught in the wrong place at the wrong time. these are the true believers. >> translator: mahmoud, just 15 years old, has absorbed isis ideology. he asks me, don't you know the verses of the koran that say the islamic state will experience hardship and then god will give it victory? one of the favorite slowingegan the islamic state is the islamic state is remaining and spreading. surprisingly enough, now that that islamic state is a speck on the map, in remain convinced of that idea.