I'm all for countries vowing not to use nuclear weapons first, but what is the point of a treaty? If a country does use nuclear weapons first, I think other countries are going to be less concerned about breaking the treaty and more concerned about WW3 and Armageddon. And given that both the US and Russia have shown scant regard for treaties in recent years with major changes to policy, surely the treaty wouldn't be worth the paper it's printed on.