On April 5th in Prague, Mr Obama reiterated a campaign promise to hold talks with Russia to reduce both American and Russian nuclear stockpiles, to push for a global nuclear test ban and to set up an international nuclear fuel bank to help with peaceful nuclear-energy programmes.

ECONOMIST: Barack Obama's foreign policy

In 2009 President Nursultan Nazarbayev offered to host a nuclear fuel bank under the International Atomic Energy Agency's jurisdiction.

BBC: Banking on nuclear peace in Kazakhstan

And with your Nuclear Threat Initiative, you helped us ratify the New START treaty, rally the world to secure nuclear materials, strengthen the global nonproliferation regime, and create an international fuel bank for peaceful nuclear power.

WHITEHOUSE: The White House