Mende Nazer lost her childhood at age twelve, when she was sold into slavery. It all began one horrific night in 1993, when Arab raiders swept through her Nuba village, murdering the adults and rounding up thirty-one children, including Mende. Mende was sold to a wealthy Arab family who lived in Sudan's capital city, Khartoum. So began her dark years of enslavement. Her Arab owners called her "Yebit," or "black slave." She called them "master."...