Another US housing bubble?

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US house prices have leapt the most in nearly seven years, according to a key index. We ask whether it's a sign of real recovery in the American economy - or whether we're witnessing the beginning of a new housing bubble. Also Australia is the happiest country in the world, says a new survey by the Organisation for Economic Co-operation and Development. How much is down to economics? Plus the illegal download sites kept alive by advertising - and a quiet corner of southern England becomes the latest front in the battle over fracking.