Big Question

In all of history, there has always been a tribe, an empire, a nation, or a country that rises and becomes dominant, a powerhouse. But all these superpowers have fallen. Even the greatest like the massive Roman Empire. Today America is considered to be that nation. It's the "land of the free and home of the brave". People from all around the world come to the U.S. because it's so great. Will history repeat itself? With the unemployment rate shooting out the roof, the war in the mid east over the last ten years, an unstable economy, a national debt of fifteen trillion dollars, and much more fuel for the flame; is America declining and falling off the top spot? Is it a matter of "if" or "when" that the U.S. loses everything?