A riot police officer tries to extinguish burning tyres during a protest marking the 1973 military coup in Valparaiso city, about 121 km (75 miles) northwest of Santiago, September 4, 2013. September ... more 
A riot police officer tries to extinguish burning tyres during a protest marking the 1973 military coup in Valparaiso city, about 121 km (75 miles) northwest of Santiago, September 4, 2013. September 11 marks the 40th anniversary of the coup d'etat in Chile that ushered in a 17-year dictatorship under General Augusto Pinochet. REUTERS/Eliseo Fernandez (CHILE - Tags: POLITICS ANNIVERSARY CIVIL UNREST) less 
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Reuters | Photo By Eliseo Fernandez / REUTERS
Wed, Sep 4, 2013 5:12 PM EDT