they were keeping their weapons. this is where they retreated to. >> we found them because they got up and moved. they went over to another location to pull some weapons out. when they went back into their beddown location, we were able to go ahead and conduct a strike on them. >> this strike, just days before on an isis tunnel in mosul. that city controlled by isis not so long ago. and this strike on another isis hideout north of baghdad, where they were sleeping at night. >> the best way to describe it would be sleeper cells, because they're there intentionally, trying not to draw attention, you know, live another day to fight. >> but you're fairly convinced you've got two isis fighters? >> if i was a betting man, i'd put money on it. >> at sunrise, we are taken to a remote area not far from the command center, where we are told helicopters will soon drop off iraqi commandos being trained by u.s. forces. they land, american troops vanishing in the desert sand. these u.s. forces are shadowing, watching the iraqis as they drill.