Good ole China. You know they still call us enemy #1 even though we buy all their crap. I doubt the US will be able to do much other than bellow if China truly decides to go after Taiwan. With that being said I dont think right now it is more then saber rattling. I think China's army is still weak for one reason. They still can't make their own weapons. For now. Your right they could shut us down economically.
What really bothers me is the BRIC alliance. Brazil-Russia-India-China. Over the next 50 years, the BRICs economies could become a much larger force in the world economy... If things go right, in less than 40 years, the BRICs economies together could be larger than the G6 in US dollar terms. Why would they need the U.S.