Nigerian oil spill haunts locals four years on

In 2008, a spill caused by a fault in a Shell pipeline resulted in tens of thousands of barrels of oil polluting the Nigerian delta. While Shell has already admitted the environmental damage is their fault, four years on the oil still floats on Bodo's waters. Local human rights groups say it is killing and contaminating plants and wildlife in one of Africa's most bio-diverse regions. Mohammed Adow reports from the town of Bodo.