and also, he has to think about the legacy, he does not want to be that president associated with the perpetual war in afghanistan. let's talk about continuing on the american theme, if we may, michael. biden, in a sense, decided on friday, to hit back and hit back hard, so we had this thing about no... that it can secure an airport hundreds of thousands of miles away and get people home. but that's still ongoing. we will see what securing the airport amounts to. whether that is the taliban choosing not to attack. and of the practicalities of that, he's clearly trying to this he's clearly trying to use this as a demonstration of american power, and to some extent that that to the american homeland that came from afghanistan has gone.