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Progress towards nuclear disarmament?

In April 2009 President Obama set out his vision for a world without nuclear weapons, and in doing so laid the groundwork for renewed international efforts to strengthen and advance the nuclear disarmament and non-proliferation regime. Over the past year that momentum has translated into the agreement of a successor to the US-Russia START treaty, global commitments to secure highly vulnerable nuclear materials within four years and the establishment, at the May 2010 Review Conference, of an action plan in support of the three main pillars of the Nuclear Non-Proliferation Treaty. This paper examines the prospects for achieving that vision of 'global zero'.