Two weeks ago $1.5 billion vanished from a cryptocurrency platform - it’s thought to be the biggest crypto heist ever. They had fallen into the hands of some infamous hackers - the Lazarus Group. These hackers have alleged ties to the North Korean government and have managed to steal huge amounts of money from other crypto platforms before.

The BBC’s Cyber Correspondent, Joe Tidy, takes us through all the details and explains why North Korean hackers are so untouchable.

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