Crossing Continents - Somalia

Just over a year ago, Ethiopia sent its troops into Somalia to chase an Islamist movement from the capital, Mogadishu. But anger at the presence of Ethiopian troops has boosted support for radical Islamist groups, and in recent weeks violence has increased. Rob Walker meets the Somali insurgents fighting against the Ethiopian troops and asks whether Ethiopia's intervention has helped to create precisely the threat they had hoped to eradicate.