u.n. in the bush administration. thank you for coming on. let me start with the same question that i asked leon panetta. have you thought about what you may vo gotten wrong in the last 20 years? i think one of the principal mistakes made is that leaders did not explain why it is in our national security interests to have a continuing u.s. military presence in afghanistan. as an insurance policy to make sure that the taliban did not come back to power, and provide safe aichb haven for isis, al qaeda, and other groups. and also the threat of the terrorist government inback stan. for that strategic reason it has been valid for to years. but i think it got lost in the