The gangs which now control up to 90 per cent of Haiti’s capital must be persuaded to end their campaign of violence which has left the children of the Port-au-Prince region without safety, schooling and sufficient food to eat, the UN’s top envoy for Children and Armed Conflict has told UN News.   “One of my biggest fears is that the youngest of the young in Haiti might also become victims of trafficking, particularly girls, for sexual purposes,” Special Representative Victoria Gamba, said, telling Cristina Silveiro that she is determined to visit the crisis-wracked nation “at the first opportunity” and confront the gang leaders face to face.