 Probably the United States, the truth is that we have not, at this point, been able to come to grips with the war on terrorism in a way which we can convince ourselves is effective. We haven't shown that we are winning in Afghanistan or Iraq. We haven't been able to create a forced posture that really we can afford over time. And this is one of the key challenges Secretary Gates has discovered. But more broadly, if we look at the last six years, whether it's the Pew Trust, the Gallup Poll, Oxford Analytic, or virtually any other poll, at no point in our post-war history has world opinion become so steadily unfavorable to the United States, to its actions overseas, to the faith in what the United States is doing as a leader. And this is something Americans really have not yet fully understood and appreciated. It is an absolutely critical thing to change. Now, beyond that, we obviously have the usual suspects, the problems of North Korea, the problem of Iran, the problem of proliferation, the problem of dealing with an ideological struggle in Islam that plays out, not only in terms of terrorism, but a regional threat to energy. We still have great questions about what's going to happen in terms of China, in terms of Russia. These are not immediate threats, but when we talk about strategy, the issue always is, what do you need to deal with immediately, as distinguished from what is the worst threat of the moment.