Surviving on leaves and berries - S. Sudanese on brink of famine South Sudan rebel chief Riek Machar is expected to return to Juba on Monday, the best hope yet to end a brutal civil war that saw the world's youngest nation spiral into catastrophe and pushed to the brink of famine. In South Sudanese war zones, tens of thousands are being starved to death, surviving on leaves and berries. A voiced AFPTV report