Iran nuclear talks enter crunch phase of diplomacy

Six world powers, Islamic Republic launch new round of nuclear talks in Vienna, with the aim of resolving their decade-old dispute by July 20 despite skepticism a deal is possible.

Iranian FM Mohammad Javad Zarif (L) and EE foreign policy chief Catherine Ashton at nuclear talks in Vienna March 19, 2014.  (photo credit: REUTERS)
Iranian FM Mohammad Javad Zarif (L) and EE foreign policy chief Catherine Ashton at nuclear talks in Vienna March 19, 2014.
(photo credit: REUTERS)
VIENNA - Six world powers and Iran launch the decisive phase of diplomacy over Tehran's nuclear work during three-day talks starting in Vienna on Wednesday, with the aim of resolving their decade-old dispute by July 20 despite skepticism a deal is possible.
After three months of broad discussions about expectations rather than possible compromises, the sides now plan to start drafting the text of a final accord that could put an end to years of hostility and mistrust and curtail the risk of a new war in the Middle East.
In the next two months, the six powers - the United States, Russia, China, France, Britain and Germany - want Iran to agree to dramatically cut back its nuclear work, which they fear has the aim of producing weapons, while Iran wants them to eliminate devastating economic sanctions.
Diplomats from both sides have said they want to resolve all sticking points about issues such as Iran's capacity to enrich uranium and the future of its nuclear facilities, as well as the timeline of sanctions relief, by the middle of July.
After that, an interim deal they struck last November expires and its extension would likely complicate talks.
A senior US official has warned about excessive optimism.
"Quite frankly, this is very, very difficult," the official told reporters on Tuesday, speaking on condition of anonymity.
"I would caution people that just because we will be drafting it certainly does not mean an agreement is imminent or that we are certain to eventually get to a resolution."
Broadly, the six powers want to ensure the Iranian program is curtailed enough so that it would take Iran a long time to assemble nuclear bomb components if it chose to do so. The Islamic Republic denies having such intentions.
Central to this will be the number of centrifuges, which potentially can enrich uranium to bomb-fuel quality, that will be acceptable to remain in Iran.

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Tehran has about 10,000 of the machines operating but the West will likely want that number cut to the low thousands, a demand that could be unacceptable to Iranian negotiators.
Iran's research and development of new nuclear technologies and the amount of stockpiled enriched uranium it can keep will also be crucial.
Enriched uranium can be used as fuel in nuclear power plants or in weapons if purified to a high enough level.