The US history on this story
U.S. policy on nuclear disarmament is at best a mixed bag; that of the other eight nuclear armed powers is not much better.

Let us begin by adding up the pluses and the minuses of nuclear disarmament.

On the plus side, we have a president of the United States, which is central to the problem, who has spoken out repeatedly on the subject, albeit in a decelerating mode. In a speech at Purdue University on Jun. 16, 2008, he said, "It's time to send a clear message to the world: America seeks a world without nuclear weapons ... we'll make the goal of eliminating all nuclear weapons a central element in our nuclear policy."

There was no reference to how long it might take. A year later, in the famous Prague speech of May 6, 2009, Obama said, "I state clearly and with conviction America's commitment to seek the peace and security of a world without nuclear weapons," but he added, "This goal will not be reached quickly -- perhaps not in my lifetime."

He was 48 at the time. Four years later, on Jun. 19, 2013, in Berlin, Obama said, "Peace with justice means pursuing the security of a world without nuclear weapons -- no matter how distant that dream may be."

In all fairness, the trajectory to abolition announced in Prague has either been implemented or blocked through no fault of the president: A substantial reduction in nuclear arms has been negotiated with Russia and the role of nuclear weapons in U.S. security strategy has been lessened.

The ratification of the Comprehensive Test Ban Treaty and the negotiation of a Fissile Materials Treaty, both of which the Obama administration favors, have been held up, one by the U.S. Senate, the other by another country.

much more: http://www.huffingtonpost.com/peter-weiss/nuclear-disarmament_b_4905377.html