[TheRealThing]

Ive often found myself thinking about isolationism as a nation, and I prefer to stay out of affairs, especially when other world leader do not feel the need to step up and contribute, but in todays world, is almost impossible as a country to stay away from different affairs.
You bring up a good point about China or Russia, or worse, both, throwing everything they got at us at one time and figuring out if we could hold steady.
To be honest, China will never make that mistake. If they did send 90% of there military to attack out home land, theres would be lost to Japan in a week. IMO, China would have to leave at least half there army at home at all times, which as you know consist mostly of ground troops.
Russia on the other hand may be stupid enough to try, although im not sure why as I feel we could decimate theyre entire forces in a short amount of time, and there structure and pride just isn't what it was. I feel like they would have an enormous amount of deserters.
But, even if these countries, and all others decided to attack us at once, im still fully in belief that the things we have under wraps and secretly stashed away would be the ends of all others that try. In the end, we would have a successful nuclear missile defense while they couldn't stop ours. And we would take it to that level if we needed to save our lands.

I don't know where we stand right now as far as our capabilities to shoot down incoming ICBMs, but I do know that as late as 2007 General James E Cartwright, the head of the US Strategic Air Command under whose direction missile defense falls, was saying that we had a long way to go before we could relax.
http://www.airspacemag.com/military-avia...st=&page=4

I'm sure we've improved the program since then and you know the results of those improvements are classified, but it's still scary to me.