2014 World Economic Forum

The World Economic Forum (WEF) brings political, business and civil society leaders together to discuss economic development issues.

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Iran nuclear talks may be extended as U.S. sees 'big gaps'

VIENNA - World powers and Iran struggled on Saturday to overcome crucial differences that are preventing them from ending a 12-year standoff over Tehran's atomic ambitions, raising the prospect of another extension to the high-stake talks. | Video