I'm pretty sure if the US mainland is threatened by any foreign actor, the entire planet is toast. They could maybe have a cold archive in Svalbard for future a

I'm pretty sure if the US mainland is threatened by any foreign actor, the entire planet is toast. They could maybe have a cold archive in Svalbard for future alien xenoarcheologists trying to figure out why human civilization self-destructed. Now, a civil war, that's a different story.