I agree that even if we got hit with a huge invasion, we would be ready for it, with our survalence tactics. But if we got hit with a few nukes first to stun us, then a large invasion, would we fight back? I also agree with what someone else said, that a civil war would be the most likely. This country is ripe for a revolution and the shelf life of a democracy is about two hundred or so years. We are just getting too big to be the democratic republic we are, unless we get revamped by a new leader, not just another hollow suit promising "change".