World leaders gather for G20 summit in US
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World leaders including President Obama have flown into the US city of Pittsburgh for the latest G20 summit.
The two days of talks are intended to work out a common consensus on reviving the world economy and preventing another financial crisis.
But with so much to get through in such a small space of time, many people are not holding out for a concrete plan of action.
An intense security operation is in place in Pittsburgh and police have already fired tear gas during skirmishes with anti-capitalist protesters.
Scores of anarchists were involved in a tense stand-off with heavily armed security forces.
But they were repeatedly thwarted in their attempts to break through police lines.
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