thanks to bush we have a missle sheild as a last defence
1. You do not yet have a missile shield
2. While the missile shield
might provide some defence, the proposed mid-flight defence strategy can be easily and cheapily overcome with easy-to-produce counter-measures (see the November issue of
Scientific American for details).
If there is to be a war, china would attack us, and that is not going to happen. If they do, we whoop their buts, so they lose either way.
America is
far more likely to attack China than China is to attack America; China has had more than a few occasions in which America has taken actions which would form a clear-cut "act of war" justification for an attack (launching multiple missiles at the embassy and flying warplanes through their airspace to name two).