Re: Fgs
There is not much point in having a nuclear arsenal if we can only aim it when the yanks say its ok.
With nuclear stuff I doubt that it would matter much if one was a couple of miles off, and as it would probably trigger MAD (from more than two adversaries, as it is now) there's not that much need for extreme precision anyway. The US and USSR managed fine (for particular values of 'fine') without GPS precision for decades that way.
It's the conventional guided missiles that you want to fly in the bathroom window, then down the stairs and into the storage cupboard that need it.