BONNY ISLAND, Nigeria, Dec 3 (Reuters) – Niger Delta fishermen are no strangers to seeing oil spill into their waters from leaky pipelines, but even they were shocked by the scale of the slick stretching for miles from a Shell facility across the swamps and into the ocean.

Source: http://feeds.reuters.com/~r/reuters/AfricaNigeriaNews/~3/Z_Is7MtkbYA/idAFL6N0TN34220141203