The United States are heading right for disaster. Sooner or later the politicians of said country will have tested the patience of the world a little too much and... Nothing good has ever come from extreme expansionist behavior, whether it's territorial or economic.
Either some crazy taliban will dirty-nuke everything to pieces or a real country or alliance of countries will. The foreign policy and economic influence has really become too much for the world to accept willingly. Just look at the financial crisis... Who can say the U.S. is not to blame for the steep oil prices, the credit failure and everything that have followed in it's wake?
Long live America... At least I hope so, but I don't think it'll last. Love the culture and the people, but not much more than that.
I'd like to see the United States taking on a neutral role in world politics, much like Switzerland and Sweden. Meddling in other peoples' business is generally unhealthy; and don't give me the terrorist bullshit. Terrorists only exists because they disagree with your country's current politics. It may come as a total surprise to you, but it didn't start with them crashing planes into the World Trade Center. You took the fight to them way before that.