The chaos in Darfur, the war-ravaged region in Sudan where more than 200,000 civilians have been killed, has spread across the border into Chad, deepening one of the world’s worst refugee crises. Arab gunmen from Darfur have pushed across the desert and entered Chad, stealing cattle, burning crops and killing anyone who resists. The lawlessness has driven at least 20,000 Chadians from their homes, making them refugees in their own country. Full Story