Training centre for North Korea's cyber spies revealed after Sony hack

Just like in a Bond movie, an army of teenage geniuses tap away at keyboards in fortified complex tucked away from prying eyes in a rogue state, bent on bringing cyber-carnage to their Western enemies on the orders of their leader who is bent on revenge.

But this isn't the plot line from a film. This is North Korea in 2014. And the cyber-warriors inside have diverted from their usual work of disrupting governments and big business to turn their collective fury on Sony.

The building, the Kim Il-Sung Military Academy, is one of four North Korean universities known to train children, hand-picked for their intelligence from all around the country, and turn them into recruits for an elite group of hackers simply known as Unit 121 or Bureau 121.

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