Mr Obama's vision of a nuclear weapons free world going back to his days at Columbia University. There as a senior he took Prof. Michael Baron's seminar on international politics and American policy. In a paper for that course Mr Obama analyzed how a President might go about negotiating nuclear arms reductions with Russia. Baron says Obama has been thinking about these issues for a long time. About this time Obama wrote an essay in the Columbia Sundial student newspaper. This was the time when the Greens movement for a nuclear weapons free world was strong in Germany, and Reagan was pushing for a nuclear arms development race with Russia. The article was titled "Breaking the War Mentality." As a senator Obama joined Senator Dick Lugar -who has worked hard for non-proliferation- on a trip to Russia to monitor efforts by Ruusia to scrap nuclear arms and secure atomic materials from theft or diversion. He allied himself with four Reagan period veterans Kissinger, Shultz, Perry and Sam Nunn, who in a 2007 WSJ op-ed article, argued that it was time- as the headline for the article said -to work for "A World Free of Nuclear Weapons." The steps in practice Obama plans to take are the following. A Fissile Material Cutoff Treaty, which would bar all nations signing it from making fuel for their atomic bombs. Rewriting crucial provisions of the 1968 Nuclear Nonproliferation Treaty, strengthening inspection provisions and closing loopholes that let N. Korea drop out in 2003. Countries would have to give up the freedom to make fuel for reactors and instead buy it from an international fuel bank. Global consensus and prevention when it comes to deviant states hoping to enhance their own security, or regimes or terrorist groups, will be crucial in setting up a new system for a nuclear weapons free world....