the nato border to the north is irrelevant, it's swamps and forests. if mainland russia will not border nato on the west, no problem with that. weapons remain a problem, but right now the only answer is to build and deploy similar weapons. perhaps if the situation worsens in the future we will see the deployment of missiles closer to the us and a repeat of the caribbean crisis, i am sure the americans will not just look at this and say "the russians are already reaching us with nuclear missiles, what's the difference".
Russian Federation