approaching the city center, working their way past, as we've talked about, all of ieds, bombs, tunnels, houses wired to blow up. very tough slow dangerous work. but taking ramadi back, you know, it depends whether or not they will be able to hold it over the long term, will be able to deal with any isis insurgency in the city if you will and whether or not the sunni fighters who come in to hold it will be able to ensure that a new round of sectarian violence between shia and sunni does not break out in ramadi. that may be the real key to long term success. >> barbara is talking about the key to long term success there. what will the factors be in whether the iraqis be able to hold that city, general? >> well, i think barbara first of all, laid out what it's going to take to clear it. and then to some extent hold it. but the real issue is the build