Mexican farmer and activist Ignacio del Valle (R) shouts during a demonstration to mark the 17-month anniversary of the disappearance of the 43 missing students of Ayotzinapa College Raul Isidro Burgos, outside the Supreme Court building in Mexico City, Mexico February 26, 2016. The students disappeared on the night of September 26, 2014 in the southwestern city of Iguala. REUTERS/Henry Romero