Striking teachers intending to block a main avenue, try to get past a wall of riot police, in Mexico City, Wednesday, Sept. 11, 2013. Teachers disrupted the center of one of the world's largest

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Striking teachers intending to block a main avenue, try to get past a wall of riot police, in Mexico City, Wednesday, Sept. 11, 2013. Teachers disrupted the center of one of the world's largest cities for at least the 14th time in two months, decrying newly enacted education reforms that tries to break union control of Mexico's education system by requiring regular standardized teacher evaluations. President Enrique Pena Nieto dashed the teachers' hopes of blocking the overhaul when he signed the new testing system into law Tuesday. (AP Photo/Christian Palma) less 

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Associated Press
Thu, Sep 12, 2013 12:13 PM EDT