Francisco Sanchez Nava (R), student of the Rural Normal School "Raul Isidro Burgos" of Ayotzinapa, Mexico, takes part in the "43 South American Caravan" with relatives of the missing students of his school, social organizations and Mexican residents in Argentina, in Buenos Aires, Argentina, on May 26, 2015. According to local press, parents and relatives of the missing students of the Rural Normal School "Raul Isidro Burgos" of Ayotzinapa carried out the "43 South American Caravan" in search of support and announce their demands after eight months of the disappearance. (Xinhua/Martin Zabala)
