Well the USA hasn't so what you said right there pertains to no one. In the history of War period we have dropped 2, and our government wouldn't drop nukes now because basically it could boil down to the end of the world, there is no telling how many nukes are out their between countries...no one will drop em tho because with in like 15 seconds of it launching it will be detected and nukes would be exchanged....just too much drama