French President Nicolas Sarkozy waves to reporters after being greeted by Canadian Prime Minister Stephen Harper upon his arrival for the G8 and G20 summit at the Deerhurst Resort is Huntsville, Ontario. Canada, Friday, June 25, 2010. (AP Photo/Christophe Ena, Pool)AP - After failing to resolve their differences on economic strategy, world leaders are turning their attention to grappling with some of the globe's toughest foreign policy problems.




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