Hon PHIL TWYFORD (Minister for Disarmament and Arms Control): This weekend, I'll be travelling to New York to head the New Zealand delegation at the Tenth Review Conference of the Parties to the Treaty on the Non-Proliferation of Nuclear Weapons, otherwise known as the NPT. The treaty came into force in 1970, and, for the last 50 years, it has been the cornerstone of international nuclear disarmament and non-proliferation. It is centred around the idea of a grand bargain whereby most States gave up the opportunity to get nuclear weapons in exchange for those five that already have them—that is, the US, Russia, the UK, China, and France—agreeing to pursue disarmament. 