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North Korea continues to rattle the world with its rapidly advancing weapons programme. Diplomacy with this Hermit Kingdom is broken and UN sanctions have little effect curtailing the nuclear ambitions of the country’s enigmatic leader Kim Jong–Un. As its closest neighbour and biggest ally, can China solve the growing threat - with whatever options remain? (image: Chinese/N.Korean sign beside the Sino-Korean Friendship Bridge connecting the Chinese border city of Dandong to North Korea over the Yalu river. Credit: Mark Ralston/Getty Images)