Graffiti referring to 43 students who went missing last September is spray painted on a wall in Mexico City as part of protests about their disappearance. Some journalists say they have struggled to cover the case. (Reuters/Tomas Bravo)
Graffiti referring to 43 students who went missing last September is spray painted on a wall in Mexico City as part of protests about their disappearance. Some journalists say they have struggled to cover the case. (Reuters/Tomas Bravo)

In Mexico, reporters struggle to cover unrest over missing students