Federal police helicopters fly over Zocalo Square after striking members of the teachers' union CNTE were evicted from the area in downtown Mexico City September 13, 2013. Violence broke out in the ... more 
Federal police helicopters fly over Zocalo Square after striking members of the teachers' union CNTE were evicted from the area in downtown Mexico City September 13, 2013. Violence broke out in the historic heart of Mexico City on Friday as scores of riot police forcibly evicted thousands of striking teachers occupying the capital's iconic Zocalo just days before Independence Day celebrations in the capital. Firing tear gas at angry protesters, riot police braced for violence as they swept into downtown Mexico City to re-take control of the Zocalo and its surrounding streets, the culmination of weeks of protests that had seen teachers set up a massive protest camp in the world's second largest square. REUTERS/Tomas Bravo (MEXICO - Tags: TRANSPORT POLITICS CIVIL UNREST BUSINESS EMPLOYMENT EDUCATION) less 
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Reuters | Photo By TOMAS BRAVO / REUTERS
Fri, Sep 13, 2013 8:58 PM EDT