More than five hundred Sudanese refugees have fled to Israel to escape genocide in Darfur in the last two months. Many have been shot dead while crossing the border from Egypt, or imprisoned in Israel under an archaic law which declares them 'enemy nationals'. Now Israel is threatening to deport them. Al Jazeera's Sherine Tadros speaks to refugees who have made the perilous journey about the past they are escaping and the uncertainty of their future.