A masked armed man checks the identity of a driver at a roadblock at the entrance to the town of El Pericon, near Ayutla, Mexico, on January 18, 2013. Hundreds of men in the southern Mexico state of Guerrero have taken up arms to defend their villages against drug gangs, a vigilante movement born of frustration at extortion, killings and kidnappings that local police are unable, or unwilling, to stop. (Photo by Dario Lopez-Mills/AP Photo via The Atlantic)
