A Tuareg child pushes away a Bella girl (L) at a camp for Malian refugees in Goudebou, Burkina Faso, April 5, 2014. Half a million people fled the conflict in Mali, some crossing the border to neighbouring Burkina Faso. Fleeing Tuaregs took with them their livestock and servants from the Bella ethnic group, a marginalised people who for centuries have been kept in slave-like conditions throughout Mali, Niger and Mauritania. To match story MALI-SLAVES/ Picture taken April 5, 2014. REUTERS/Misha Hussain (BURKINA FASO - Tags: SOCIETY IMMIGRATION TPX IMAGES OF THE DAY)