Sony Hack: North Korea Threatens US as Row Deepens

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Could Sony have done more to beef up its cybersecurity? We talk to Ken Cukier, big data expert at The Economist newspaper. Also, a Spanish judge has ordered the king's sister, Princess Cristina, to be tried along with her husband on charges of tax fraud. Plus, the plight of migrant Nepalese workers in Qatar building hotels and stadiums for the 2022 World Cup. We have a special report from Nepal. And, our regular commentator, Lucy Kellaway of the Financial Times newspaper, on the merits of conscientiousness in the workplace.