TOPSHOT - Demonstrators paint the helmets of riot police in Mexico City on September 26, 2020, during a march for the sixth anniversary of the disappearance of 43 students of the Ayotzinapa Teacher Training College. - The students, who had commandeered five buses to travel to a protest, 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 CLAUDIO CRUZ / AFP)