One springtime night a decade ago, bearded men wearing flip-flops kidnapped 276 girls from their boarding school dormitories in Chibok, north-eastern Nigeria. They forced the teenagers onto lorries and drove them deep into a vast forest in the savannah. "My captors did a lot of things to me and the other girls," says Glory Mainta, who was abducted that day. "We were beaten, shouted at – there’s nothing that they didn’t do to us. While they didn’t force us to marry them, what they did to us was w