Elon Musk: Space and Electric Cars

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Elon Musk, the South African-born billionaire, has helped launch the payment portal Paypal and one of America's leading solar energy companies, Solar Century. He has been called one of America's leading business innovators. Today he tells us about a couple of his other projects, Tesla Motors, one the leading manufacturers of electric road cars, and Space Exploration Technologies (SpaceX), which aims to be one of the first private companies to make a commercial profit exploring near-space. Also, we get a glimpse of North Korean soft power at work - inside the country's one and only officially sanctioned global restaurant chain. Food at 'Pyongyang' comes complete with singing and dancing waitresses. But what is it all for? And, the BBC's Rahul Tandon considers the commercial challenges for India's railway porters, posed by luggage with wheels.