A protester climbs up a barricade leaning on the wooden door of Mexican President Enrique Pena Nieto’s ceremonial palace during a protest denouncing the apparent massacre of 43 trainee teachers, in the historic center of Mexico City

A protester climbs up a barricade leaning on the wooden door of Mexican President Enrique Pena Nieto’s ceremonial palace during a protest denouncing the apparent massacre of 43 trainee teachers, in the historic center of Mexico City

A protester climbs up a barricade leaning on the wooden door of Mexican President Enrique Pena Nieto’s ceremonial palace during a protest denouncing the apparent massacre of 43 trainee teachers, in the historic center of Mexico City late November 8, 2014. A group of protesters, carrying torches, broke away from what had been a mostly peaceful protest demanding justice for the students, who were abducted six weeks ago and apparently murdered and incinerated by corrupt police in league with drug gang members. REUTERS/Edgard Garrido (MEXICO – Tags: POLITICS CRIME LAW CIVIL UNREST EDUCATION)