TOPSHOT - A relative of one of the 43 missing students of the Ayotzinapa Teacher Training College takes part in a demonstration outside the Attorney General's Office in Mexico City on September 25, 2020, on the eve of the sixth anniversary of their disappearance. - The students had commandeered five buses to travel to a protest on the night of September 26, 2014, but were stopped by municipal police in the city of Iguala, Guerrero. Prosecutors initially said the officers delivered the 43 teacher trainees to drug cartel hitmen, who killed them, incinerated their bodies and dumped the remains in a river. However, independent experts from the Inter-American Commission on Human Rights have rejected the government's conclusion, and the unsolved case remains a stain on Mexico's reputation. (Photo by Pedro PARDO / AFP)