>> so what we have on the ground in afghanistan, we have advisers, special operators. who else? who else might have been a target? >> those are the primary groups of force? likely it was a local force hosting local country forces there in afghanistan. again, that i do this all over the country, particularly in the south. it took place in southern afghanistan where taliban is present. there's a row bufts military presence helping them, much schaller than it was when the u.s. was in a direct combat role. so u.s. casualties are much more rare. this is the third combat death in 2018. as you see, u.s. force casualties have gone down, but you do see this where the u.s. is very much in harm's way. >> one of the things we don't do enough of is when we say advisers on the ground in afghanistan, what are they advising? what specifically are they doing in support of the afghan troops? >> there's a wide range of