Mexico: Ten years after disappearance of 43 student teachers, questions remain unanswered

It's the biggest mystery and probably the biggest scandal to hit Mexico in the past decade. On September 26, 2014, in the southern town of Iguala, police officers fired on several buses carrying students from the Ayotzinapa Rural Teachers' College. In the ensuing chaos, six people including three students were killed, while 43 other trainee teachers were taken away by the police, allegedly in cahoots with a local cartel. They were never seen alive again. Ten years on, the Mexican government and judicial system are unable to explain the tragedy. Our reporters Laurence Cuvillier, Matthieu Comin and Quentin Duval look back at this strange disappearance.