joining me now to talk more about it is mark quarterman, a defense and security expert from the center for strategic and international studies. thank you for joining me, mark. >> happy to be with you. >> what do you make of the relationship right now? obviously, it's not just lawmakers. you can talk to just about anybody and they are wondering out loud what kind of help osama bin laden got within pakistan's borders. >> well, the relationship between the u.s. and pakistan is clearly strained. the example of osama bin laden is really the latest issue of strain between the two. the fact that he could have lived for years in that house in abbottabad near the military academy, in a town with a number of retired senior military officials is extraordinary, especially given that pakistan is in many ways a society in which the military and intelligence play a central role and monitor what's going on in the society. >> senator lindsey graham and i'm going to paraphrase, but basically said you can't trust them but we need them. how does a relationship work if there is no trust? and i'm not being