Southern Sudanese villagers say government-backed militiamen are attacking them in an extortion campaign that is undermining faith in a peace accord meant to end civil war in Africa’s largest country. Residents of Old Fangak, an isolated settlement in Upper Nile State, and aid workers say militia groups which are not signatories to the accord sealed in January pose a big threat to the oil-exporting country’s bid to end 21 years of conflict. Full Story