Chicago police clashed with scores of protesters after more than 2,000 thousand demonstrators marched peacefully to the edge of the NATO summit where President Obama is meeting with world leaders. A city permit allowed protesters to march until 4:15 p.m. local time. About 30 minutes after that, police began forcibly dispersing the crowd by driving the demonstrators out of the streets near the McCormick Place convention center where the summit convened.
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