Five countries were recognised as nuclear weapon states under the 1970 Non-Proliferation Treaty: the United States, Russia, the United Kingdom, France and China. Other states now with nuclear weapons include India, Pakistan and North Korea — and Israel is thought to have them too. Alfred Nobel, who invented dynamite but was appalled at the thought that he would be remembered as leaving such a deadly legacy, would be pleased with the Nobel Committee's decision to issue such a clear warning against any future use of nuclear weapons. Background music: 'Sarabande' by Joel Cummins
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