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			 The comments from the officials, who asked not to be named, 
			highlight how difficult it may be for the Western powers to keep the 
			nuclear negotiations separate from other regional conflicts. Iran 
			wields influence in the Syrian civil war and on the Iraqi 
			government, which is fighting the advance of Islamic State fighters. 
 Iran has sent mixed signals about its willingness to cooperate on 
			defeating Islamic State (IS), a hard-line Sunni Islamist group that 
			has seized large swaths of territory across Syria and Iraq and is 
			blamed for a wave of sectarian violence, beheadings and massacres of 
			civilians.
 
 Iran's Supreme Leader Ayatollah Ali Khamenei said recently that he 
			vetoed a U.S. overture to the Islamic Republic to work together on 
			defeating IS, but U.S. officials said there was no such offer. In 
			public, both Washington and Tehran have ruled out cooperating 
			militarily in tackling the IS threat.
 
 But in private, Iranian officials have voiced a willingness to work 
			with the United States on IS, though not necessarily on the 
			battlefield. U.S. Secretary of State John Kerry said on Friday that 
			Iran has a role to play in defeating Islamic State, indicating the 
			U.S. position may also be shifting.
 
			 "Iran is a very influential country in the region and can help in 
			the fight against the ISIL (IS) terrorists ... but it is a two-way 
			street. You give something, you take something," said a senior 
			Iranian official on condition of anonymity.
 "ISIL is a threat to world security, not our (nuclear) program, 
			which is a peaceful program," the official added.
 
 Tehran rejects Western allegations that it is amassing the 
			capability to produce atomic weapons under cover of a civilian 
			nuclear energy program.
 
 Another Iranian official echoed the remarks. Both officials said 
			they would like the United States and its Western allies to show 
			flexibility on the number of atomic centrifuges Tehran could keep 
			under any long-term deal that would lift sanctions in exchange for 
			curbs on Tehran's nuclear program.
 
 "Both sides can show flexibility that will lead to an acceptable 
			number for everyone," another Iranian official said.
 
 WEST WANTS TO KEEP ATOMIC TALKS SEPARATE
 
 Kerry held bilateral talks with Iranian Foreign Minister Mohammad 
			Javad Zarif in New York for more than an hour on Sunday, a senior 
			State Department official said. The meeting focused on the need to 
			make progress in this week's nuclear talks and the threat of Islamic 
			State.
 
 The official did not provide details on the discussions between 
			Kerry and Zarif, who met for the first time a year ago on the 
			sidelines of the U.N. General Assembly when Iran and six world 
			powers reopened negotiations with Tehran.
 
 Western officials told Reuters that Iran has not raised this idea in 
			nuclear negotiations with the United States, Britain, France, 
			Germany, Russia and China that resumed in New York on Friday. 
			Diplomats close to the talks say they are unlikely to settle in New 
			York on a long-term accord that would lift sanctions in exchange for 
			curbs on Iranian nuclear work.
 
 The Western officials said it would be difficult for them to even 
			discuss the point in the atomic negotiations as the United States 
			and its allies are determined to keep the nuclear negotiations 
			focused exclusively on atomic issues as the Nov. 24 deadline for a 
			deal nears.
 
 "We are seeing as we get closer to the end of the talks that the 
			Iranians are tempted to bring other dossiers to the table," a senior 
			Western diplomat said.
 
			
			 
			
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			"They sometimes indicate that if there were to not be a (nuclear) 
			deal, the other dossiers in region would be more complicated," he 
			added. "The six are determined not to bring the other subjects to 
			the nuclear negotiations table." The New York talks among senior 
			foreign ministry officials from the six powers and Iran are taking 
			place on the sidelines of this week's annual gathering of world 
			leaders at the U.N. General Assembly.
 The number of nuclear centrifuges has emerged as the principal 
			sticking point in negotiations, which are expected to continue in 
			New York until at least Sept. 26.
 
 Centrifuges are machines that spin at supersonic speed to increase 
			the ratio of the fissile isotope in uranium. Low-enriched uranium is 
			used to fuel nuclear power plants, Iran's stated goal, but can also 
			provide material for bombs if refined much further, which the West 
			fears may be Iran's latent goal.
 
 Iran currently has over 19,000 centrifuges, though only around 
			10,000 of those are operational. The six powers want Iran to reduce 
			the number of operational centrifuges to the low thousands, to 
			ensure it cannot quickly produce enough bomb-grade uranium for a 
			weapon, should it choose to do so.
 
 Iranians are keen to keep as many of their centrifuges as possible, 
			and have also suggested that they could keep all 19,000 installed 
			while maintaining a much smaller number in an operational state. 
			Western officials say they dislike that idea.
 
 U.S. officials have made clear for months that the number of 
			centrifuges they are willing to tolerate operating in Iran over the 
			medium term would be in the low thousands to ensure that Tehran's 
			ability to produce a usable amount of bomb-grade uranium, should it 
			go down that road, is severely limited.
 
 Iran says such draconian limitations would be a violation of its 
			right to enrich. Supreme Leader Khamenei has called that issue a 
			"red line" for Tehran.
 
 Centrifuges are not the only sticking point in the talks. Others 
			include the duration of any nuclear deal, the timetable for ending 
			the sanctions, and the fate of a research reactor that could yield 
			significant quantities of bomb-grade plutonium.
 
			
			   Under a November 2013 interim deal, Iran froze some parts of its 
			atomic program in exchange for limited sanctions relief. That 
			agreement was intended to buy time for negotiations on a 
			comprehensive deal that end the decade-long standoff with Iran and 
			remove the risk of yet another war in the Middle East.
 (Additional reporting by Lesley Wroughton in New York, John Irish in 
			Paris and Arshad Mohammed in Washington; Editing by Marguerita Choy)
 
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