The content originally appeared on: CNN Hong Kong (CNN)Five of the world's largest nuclear powers pledged on Monday to work together toward 'a world without nuclear weapons' in a rare statement of unity amid rising East-West tensions. 'A nuclear war cannot be won and must never be fought,' said the joint statement, which was issued simultaneously by the United States, Russia, China, the United Kingdom and France. 'As nuclear use would have far-reaching consequences, we also affirm that nuclear weapons […]