U.S. Secretary of State John Kerry shakes hands with Iranian Foreign Minister Javad Zarif. Photo: U.S. Department of State.

Reuters – Iran has reduced demands for the size of its future nuclear enrichment program in talks with world powers although Western governments are urging Tehran to compromise further, Western diplomats said on Thursday.

The diplomats, who spoke to Reuters at the start of a two-week round of negotiations between Iran and the United States, Britain, France, Germany, Russia and China, said it would still be hard to clinch a deal by the self-imposed July 20 deadline.

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