A relative (2nd L) of a missing student holds a poster with the image of Christian Alfonso Rodriguez Telumbre, near other relatives with posters, as she takes part during a march to mark the disappearance of the 43 missing Ayotzinapa College Raul Isidro Burgos students in the state of Guerrero, along the streets in Mexico City, Mexico September 26, 2018. REUTERS/Henry Romero