A masked demonstrator carries a traffic signal during riots after a student protest in Santiago, Tuesday, Aug. 9, 2011. Masked demonstrators burned cars and barricades, looted storefronts and threw ... more 
A masked demonstrator carries a traffic signal during riots after a student protest in Santiago, Tuesday, Aug. 9, 2011. Masked demonstrators burned cars and barricades, looted storefronts and threw furniture at police as students marched by the tens of thousands to keep pressure on the government for changes in public education. Police responded with tear gas and water cannons. (AP Photo/Luis Hidalgo) less 
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Associated Press | Photo By Luis Hidalgo
Tue, Aug 9, 2011 7:33 PM EDT