That will honestly be a sad day. The day nuclear war breaks out between two of the worlds strongest millitaries, you're possibly looking at the end of life as we know it. If they do decide to nuke us, I certainly hope we look for every alternative that we can before making the same mistake and launching nukes at them. Of course, if there's no alternative then what can you do. I hope our leaders are smarter than that, but that's somewhat doubtful.