right through northern iraq. you know, they flashed some peace signs at us as they were driving through. they didn't get the same kind of rage here in northern iraq. they didn't have as many people throwing things at them as they did in northern syria. the images you saw with people throwing vegetables and rocks, there was a little bit of that in nearby you a-- the capital. that anger is not going to go away, brian. >> where do you put -- where do you put the chance that things will deteriorate so badly or cross an imaginary line enough to recommit americans coming the other way on those same highways? >> reporter: i think what it would take, brian, is a reformation of the islamic state. that's really why the americans aren't going home. donald trump initially said these american troops would head back to the states. they're coming here to to iraq