The task that has fallen to us as Americans is to move the conscience of the world, to keep alive the hope and dream of freedom. For if we fail or falter, there'll be no place for the world's oppressed to flee to. This is not a role we sought. We preach no manifest destiny. But like the Americans who brought a new nation into the world 200 years ago, history has asked much of us in our time. Much we've already given; much more we must be prepared to give.