requires the cooperation of the taliban? >> yeah. this is where american leverage is going to be crucial. we only have a few lines of leverage left, frankly, that we can use with the taliban if we're not willing to use physical violence to expand perimeters and you've gone into why that would be difficult and cost so many more american lives to do that. we have leverage with the taliban because they do want some international -- they want international aid coming in. about 80% of the budget was foreign assistance. as that assistance disappears, the taliban would like to have some of that foreign aid and top up for the budget back. they would like international recognition, and the trade and travel ties that go with it. the taliban in the 90s got their start in a lot of ways their street credit and backing from pakistan by opening up the various check points that afghan war lords closed off and opening up trade again from pakistan