so almost having a staff meeting chair that were leading linda robinson joined. and that, what lessons to draw from iraq? >> thank you very much, patrick. i'm delighted to be part of this conversation today. and i am certainly going to draw on the boat can't tell me how this sense. i've also just finished writing a chapter for a book that is looking at less than learned from both iraq and the guinness fan and pakistan. i am by no means an expert on vietnam, so i will rely in part on our dialogue to try to extract and tie and some of these legs. i did start this chapter however save the united states is going to its most sustained and intensive experience of war since it departed vietnam 35 years ago. so i have been living through these years, i think, very conscious of the fact that this is a new vietnam generation and away. the people who were out there fighting are going through and in some ways many of the same things that service people did in vietnam. i think we also is a country are going to spend many years arguing over this war and grappling with it here