In New York, I will be making clear that the lack of action in recent years by all of the nuclear weapon States in holding up their side of the NPT's grand bargain is totally unacceptable. In recent years, we've seen massive reinvestment in nuclear weapons, nuclear modernisation programmes, and a reduction in transparency by the nuclear weapon States. Add all that to the heightened international insecurity and superpower rivalries, and you can see why the risk of nuclear catastrophe is considered to be greater now than at any time since the Cuban Missile Crisis. The nuclear weapon States must return to the path of nuclear disarmament. 