Didnt we put one into orbit yesterday?? No one is saying what the mission is but I’m reasonably positive they could bring that bad boy down anywhere on earth. The rest of the world is gonna treat it as if this is the intent.
You get something that will resist the re-entry heat coming in from space and use it as a “Rod from God” and you don’t need bunker busters. All that is needed is a guidance package.
Eventually with some non materialistic shielding or “force field” and some near the speed of light speeds even something the size of a peanut would be far greater in terms of explosive power, that is a theoretical concept that is probably coming to a reality very soon.