gnorth korea was a party to the nuclear non-proliferation treaty until 2003, and then chose to withdraw from the treaty. they have developed nuclear weapons not in compliance with the rules of the nuclear nonproliferation treaty. . host: everett, republican line. caller: i have to disagree with the guest today. i think that the nuclear weapons are a vital part of america's national security armaments. i think that if the united states were subject to a dirty bomb attack, we should reserve the right to use nuclear weapons to protect the country. secondly, if israel were attacked, we should reserve the right as well. we have a longstanding policy of not giving up the right to use nuclear weapons. obama's policy is a radical departure. i disagree with your attitude about the cold war. the cold war was a legitimate defense against a tyrannical power and i do not understand why you do not have a belief that the united states was doing the right thing. guest: on the first question, but i do not think that there is any reason to retain a role for nuclear weapons to potentially respond to chemi