A woman carries a cross with the words "Resign EPN (Enrique Pena Nieto)" during a protest in support of the 43 missing students of the Ayotzinapa Teacher Training College Raul Isidro Burgos outside the National Palace in downtown Mexico City December 12, 2014. Mexican authorities on December 7 said that mounting evidence and initial DNA tests confirmed that 43 trainee teachers who were abducted by corrupt police 10 weeks ago were incinerated at a garbage dump by drug gang members. REUTERS/Tomas Bravo (MEXICO - Tags: CIVIL UNREST CRIME LAW POLITICS)