Yves and Nadjilem, who survived a terrible ordeal, recount their traumatising experiences to AFPTV. They survived but for some it was a fatal journey, one that began with the rounding up more than 600 young Chadians - including 83 minors- in N'Djamena during a demonstration which was violently repressed, to the high-security Koro Toro prison. The prison lies in the middle of the Djourab desert which is one of the most hostile environments in the Sahara. EXCLUSIVE IMAGES AND SOUNDBITES