K9 you asked an interesting question, although I would never consider myself a liberal, it's my belief that our nation does have the authority to defend itself by keeping nations that seek our destruction from developing or acquiring nuclear weapons. By doing so, the leadership of our nation would be engaged in defending this nation and it's people by preventing our harm. While some may believe that this is advocating unilateral intervention in any nation it's far from it. Take for instance when Israel sent aircraft to destroy a nuclear facility in Iraq, they did so to prevent a nation that had made it clear they intended Israels destruction, from developing them and the end result was they defended thier nation and thier people, for our nation to do the same would not be any different. However having said all that, where many seem to disagree is the process or what constitutes a valid means of *defense* and while this only a personal opinion, in the case of a nation that has on many occasions admitted they wish your destruction and have shown they intend to develop such weapons, there should be no doubt that by prevention you are defending.