Personally, I think war is a likely risk. If an adversary wanted to take out the US, the most likely attacks would be asymmetrical ones designed to take out the

Personally, I think war is a likely risk. If an adversary wanted to take out the US, the most likely attacks would be asymmetrical ones designed to take out the US economy backing the US military. There would be coordinate attacks at critical nodes like this one. I don't know if this would be a conventional weapon launched from abroad, a conventional weapon launched from within (if I were an adversary, I might start to secretly build conventional weapons within US factories), a cyberattack, infiltration/sabotage, or something else. But I can think of a dozen ways one could do it with nation-state level resources, for a fraction of the cost of the damage done.