PAUL CHIASSON/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
The professional: Many protesters seemed to expect tear gas; like this one, they came wearing official-looking gas masks. Here, a mask-clad protester smashes the window of a television station car 
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