President Obama and President Putin
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Russia's President Putin warns US over Syria military action

The global debate about Syria is intensifying as leaders of the G20 nations head to St Petersburg for a summit.

President Putin of Russia has already warned that taking military action, without UN approval, would be seen as "an aggression".

President Obama said the international community's credibility was on the line over the use of chemical weapons in Syria.

James Robbins reports.

  • 04 Sep 2013
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