“The teachers, many armed with sticks and wearing masks, had set trash on fire and placed metal barriers in adjoining streets to block the police from entering the Zocalo, home to the National Palace, Aztec ruins and the city’s cathedral. Pena Nieto signed an education reform this week that requires teachers to undergo mandatory performance evaluations. The teachers say the new rules violate their labor rights. The dissident National Education Workers Coordinator (CNTE) union led several protests in the city for the past three weeks, disrupting traffic in the already congested megalopolis and blocking road access to the international airport in two occasions.”
http://www.rawstory.com/rs/2013/09/13/teachers-on-strike-clash-with-police-in-mexico-city-protest/