In 2016 North Korean hackers planned a $1bn raid on Bangladesh's national bank and came within an inch of success - it was only by a fluke that all but $81m of the transfers were halted, report Geoff White and Jean H Lee. But how did one of the world's poorest and most isolated countries train a team of elite cyber-criminals?
Read MoreBBC Radio 4: A Korean Thaw? →
From bombs to Olympic banners: Can winter sports diplomacy stop a war in the Korean peninsula? North Korea's leader Kim Jong Un took the world by surprise with his announcement that his nation and South Koreawould unite under a single banner at the Winter Olympics. Was it a diplomatic masterstroke or a cynical stunt? Journalist Jean Lee pieces together what really led to this public relations coup.
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