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On Wednesday, North Korea announced that the country's leader Kim Jong Un had been given the title of marshal, a move that immediately followed the Sunday surprise announcement that powerful Vice Marshal Ri Yong-ho had been removed from his posts. Before being promoted to chief of the General Staff, and then the Politburo in 2010, Ri had run the Pyongyang Defense Command, an army unit responsible for regime security. It's a sensitive job that requires the absolute trust of the Kim family.