Women dressed to depict 'La Llorana' or 'The Weeping Woman' march to remember the 43 missing students from the Isidro Burgos rural teachers college in Mexico City. The 43 students at the teachers' college of Ayotzinapa disappeared in September 2014 and have not been heard from since they were taken by local police in in the city of Iguala in southern Guerrero state. [Marco Ugarte/AP Photo]