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Iranian Foreign Minister Mohammad Javad Zarif (R) shakes hands on January 14, 2015 with US State Secretary John Kerry in Geneva. Zarif said on January 14 that his meeting with his US counterpart was vital for progress on talks on Tehran's contested nuclear drive. Under an interim deal agreed in November 2013, Iran's stock of fissile material has been diluted from 20 percent enriched uranium to five percent, in exchange for limited sanctions relief.
Iranian Foreign Minister Mohammad Javad Zarif (R) shakes hands on January 14, 2015 with US State Secretary John Kerry in Geneva. Zarif said on January 14 that his meeting with his US counterpart was vital for progress on talks on Tehran's contested nuclear drive. Under an interim deal agreed in November 2013, Iran's stock of fissile material has been diluted from 20 percent enriched uranium to five percent, in exchange for limited sanctions relief.

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    Many hurdles in the Iran nuclear talks

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Many hurdles in the Iran nuclear talks

A number of obstacles stand in the way of a lasting agreement in the Iran nuclear talks in Vienna. CNN's Atika Shubert reports.

Many hurdles in the Iran nuclear talks

A number of obstacles stand in the way of a lasting agreement in the Iran nuclear talks in Vienna. CNN's Atika Shubert reports.