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Global financial regulators are talking about whether the next crisis could come out of the unregulated shadow banking sector. Lesley Curwen talks to economist Hernando de Soto who runs the Institute of Liberty and Democracy in Lima, Peru.

Plus Bryan Roberts, research director at Kantar Retail, suggests Amazon is snapping at the heels of the world's biggest retailer, Walmart.

And veteran Washington journalist and commentator James Srodes wonders why space travel has caught America's imagination recently.