Nukes don't defend a country without a huge human force supporting and maintaining them. In addition to that, you need to constantly evolve your delivery vehic

Nukes don't defend a country without a huge human force supporting and maintaining them. In addition to that, you need to constantly evolve your delivery vehicles to overcome newly developed defense capabilities. In even the most bare-bones defense scenario, the needed investment is fairly large, and it depends on how large of an investment adversaries make.