A man holding a baseball bat argues with demonstrators during a protest march before the start of the G20 Pittsburgh Summit in Pittsburgh, Pennsylvania September 24, 2009. Police used pepper gas to disperse protesters at the Group of 20 summit in Pittsburgh on Thursday as about 2,000 people marched despite warnings that force would be used to end the demonstration. Reuters Pictures logo Reuters Pictures 29 months ago

A man holding a baseball bat argues with demonstrators during a protest march before the start of the G20 Pittsburgh Summit in Pittsburgh, Pennsylvania September 24, 2009. Police used pepper gas to disperse protesters at the Group of 20 summit in Pittsburgh on Thursday as about 2,000 people marched despite warnings that force would be used to end the demonstration.

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