Personally I don't care about the nuke issue. They have just as much right as any other country to own nukes. We're the only nation that has actually used them so we really have no gripe.
If they leave there borders with one thats a seperate matter and should be dealt with harshly. As long as they stay within there borders they can blow themselves up for all I care.
But, If they should ever use one then military area in there country should be nuked, along with the leadership.
Use diplomacy to keep them within there borders.