MEXICO-CRIME-STUDENTS

Police detain some teachers and relatives during their protest in Acapulco, Guerrero State, Mexico on February 24, 2015 demanding justice and clarification for the disappearance of 43 students from Ayotzinapa. Authorities in Mexico have stated with "legal certainty" that 43 students who went missing in September were murdered by hitmen working for a drug gang, but parents of the students in a case that convulsed the nation and countries abroad insisted the case not be closed. The disappearance of the men -- all aspiring teachers attending classes at a training college in the southern state of Guerrero -- sparked nationwide protests and a crisis for the government of President Enrique Pena Nieto. AFP PHOTO/Pedro PARDO (Photo credit should read Pedro PARDO/AFP via Getty Images)