Crackdown on bush refineries unsettles Nigeria's oil heartland

Nerves are on edge now that the military has started sending boats, jeeps and helicopters to destroy hundreds of such facilities in the country's main oil region. The government wants to prevent theft from oil company pipelines and so has turned its attention to shutting down the illicit refineries - makeshift, blackened structures of pipes and metal tanks hidden in oil-soaked clearings - that process the stolen crude. Authorities have spent the last eight months holding peace talks with the mil