Anti-riot policemen march outside a supermarket in San Fernando, on the outskirts of Buenos Aires December 21, 2012.
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Anti-riot policemen march outside a supermarket in San Fernando
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Army stages flag marches
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Riot police in Tunisia violently breaks a demonstration in central Tunis
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Argentine farmers end strike
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Hawkers protest against police highhandedness
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Police go door to door
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Thousands take out processions
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Police fire at protesters
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Colombians march to demand hostages`` freedom
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Police clearing out Occupy San Francisco
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Protesters denounce attacks;
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Anti-Mursi protesters chant anti-Mursi and Muslim Brotherhood slogans outside the gate of El-Quba in Cairo
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Police met with resistance
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Police release surveillance photos
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Colombian police foil terrorist attacks
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Officers were trying to keep marchers out of an intersection
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A police officer fires tear gas to break up a protest in Bizerte