APphoto_APTOPIX Mexico Teacher Protests

Riot police enter the Zocalo to clear out any remaining striking teachers, Friday, Sept. 13, 2013. Minutes after a late-afternoon government deadline for teachers to leave from the city’s main plaza, where they have camped out for weeks, riot police moved in, firing tear gas and ducking hurled rocks in a confrontation culminating weeks of protests against an education reform. (AP Photo/Dario Lopez-Mills)