Summary
Iran and six world powers held more "useful" talks on Tehran's nuclear program, both sides said, although a Western diplomat said they were still struggling to overcome deep disagreements on the future of Iranian atomic capabilities.
The West suspects Iran has engaged in nuclear research-and-development (R&D) work geared to yielding bombs.
A Western diplomat, who spoke to Reuters on condition of anonymity, said Iran and the six powers had made progress on scenarios for resolving a dispute over Iran's Arak nuclear reactor, which could yield significant quantities of bomb-grade plutonium if it is brought on line without major modifications.
The six powers and Iran are striving to find an acceptable compromise that would enable Tehran to carry on with limited enrichment that would not give the Iranians the ability to stockpile large amounts of purified uranium, which constitutes the core of atomic bombs if enriched to a high level.
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