RYAN REMIORZ/CANADIAN PRESS/AP
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| Chaos in Quebec: The Summit of the Americas Amid talk of free trade agreements and environmental treaties, well-prepared protesters clash with police in riot gear during the summit's first day of meetings
Breaking the barricades: Protesters representing trade unions, human rights organizations and environmental groups move toward police Friday afternoon. At first, the marchers chanted and threw rolls of toilet paper; later, they started hurling pieces of concrete 
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