I'm going to have to interject there. I'm sorry, but I only have five minutes.
Even when the aim is to constrain and that goal is achieved, the containment of a particular entity, let's say al Qaeda, could be coming through a multitude of other factors. Think of the disputes between bin Laden and Zarqawi about al Qaeda's structure, and there are many other examples. That's a leadership dispute and it's one reason al Qaeda was contained. Even then I wonder how we know which measures are in place to ensure that sanctions are effective. I'm thinking metrics here. Yes, it is very methodological, but I think it's fundamental and to the point.