http://www.bbc.co.uk/news/world-asia-17022823
Vietnamese man Pham Ngoc Canh met Ri Young-hui in 1971 when Mr Canh, then a young chemistry student, travelled to North Korea to study. He fell instantly in love with the woman he glimpsed through the door of a laboratory in Hamhung. He recalls: "My first thought was that I wished she would become my wife".