And so could our Tridents, not TO mention France and UK are nuclear powers.
I don't know what the deal is with Russia and Ukraine, but I do believe Putin's mention of using nukes is a bluff. He may be an imperialistic SOB who longs for the old Soviet empire, but I'm don't think he's a crazy SOB who has forgotten Mutual Assured Destruction (MAD).
Let them fight it out and Europe protect itself. NO MORE AMERICAN KIDS KILLED OR MAIMED!
But it is the Ukrainian's country, and if those people are willing to fight and die to defend it, I think we should give them any support we can short of that.