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A haul truck is loaded by a digger with material in the pit at Rio Tinto Group’s West Angelas iron ore mine in Pilbara, Australia, on Sunday, Feb. 19, 2012. Rio Tinto Group, the world’s second-biggest iron ore exporter, will spend $518 million on the first driverless long-distance trains to haul the commodity from its Western Australia mines to ports, boosting efficiency. Photographer: Ian Waldie/Bloomberg