Nigeria's oil thieves
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A labourer operates the engine of a locally built canoe, which contains a plastic drum used in siphoning crude oil for illegal refinery, along the Diebu creek in Nigeria's Bayelsa state May 15, 2012. Nigeria is Africa's largest crude oil exporter but its production capacity has been slashed by thieves drilling into pipelines passing through winding creeks and waterways in the vast delta. The underground industry is thought to be worth hundreds of millions of dollars a year.