Images of 43 missing students from Guerrero state hang from a tree in Mexico City . Journalists reporting on violence in the state, and on the case of the students, face threats and violence. (AP/Marcos Ugarte)
Images of 43 missing students from Guerrero state hang from a tree in Mexico City . Journalists reporting on violence in the state, and on the case of the students, face threats and violence. (AP/Marcos Ugarte)

On the front lines of reporting in Guerrero, Mexico’s most-violent state