, in order to prevent any future acts of international terrorism against the United States by such nations, organizations or persons.
That gives Bush pretty broad authority to react to other nations. All he needs to say is he believes that the action he is about to take against someone,no matter how indirect, will be in order to prevent future attacks.
The last part of the sentence is open ended enough to encompass others.
To me, the resolution is still referring to those directly responsible. I don't see it as an open-ended free-for-all.