MEXICO CITY, MEXICO - MARCH 26: A woman holds a banner during a rally to ask Mexican authorities to continue the search for the 43 kidnapped students by local police officers since September 26, 2014 in southern state of Guerrero on March 26, 2015 in Mexico City, Mexico. Relatives of the missing students have called the tenth Global Day of Action for Ayotzinapa's students to demand their safe return. (Photo by Miguel Tovar/LatinContent via Getty Images)
