Any U.S. strike might not destroy Iran nuclear sites
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Any U.S. attack against Iran could involve thousands of sorties and missile launches lasting weeks, but it still would not eliminate the country's nuclear program, U.S. military officials and analysts say.
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Iran said Sunday a U.S. military strike against it would be a "strategic blunder," but brushed aside tough talk from Washington as psychological warfare rather than a real threat.
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The US president dismisses speculation that the White House is paving the way to a strike against Iran.
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The United States is determined to stop Iran getting atomic weapons, and has signalled Washington will not rule out an attack if peaceful diplomacy failed to achieve this.
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Iran has not diverted any of the nuclear  materials it declared to the U.N. nuclear watchdog to any  prohibited activities, the watchdog said on Monday, but it  could not rule out the existence of covert nuclear work.
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A senior U.S. official said on Thursday  that satellite images of a suspected nuclear site in Iran  demonstrated its intention to develop atomic weapons, but other  U.S. officials questioned the strength of the claim.
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A senior Iranian military official said  Sunday Israel and the United States would not dare attack Iran  since it could strike back anywhere in Israel with its latest  missiles, news agencies reported.
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U.S. attempts to engage Iran on single issues like Iraq and nuclear weapons have no chance of success unless they are part of a comprehensive approach including restoring normal relations, some U.S. experts say.
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The United States is not planning for a war with Iran but is determined to stop Iranians supplying bombs for deadly attacks on U.S. troops in Iraq, Defense Secretary Robert Gates said on Friday.
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The U.N. nuclear watchdog has found no  signs of nuclear-related activity at a site in Iran called  Parchin that several U.S. officials have said may be linked to  secret atom bomb research, Mohamed ElBaradei said on Friday.
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Iran will never be prepared to  dismantle its nuclear program entirely but remains committed to  the non-proliferation treaty (NPT), its chief delegate to the  International Atomic Energy Agency said on Wednesday.
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The United States warned Iran on Tuesday the international community would have no choice but to impose sanctions if it did not halt sensitive atomic work.
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Secretary of State Colin Powell said  on Friday that Washington had no way to force Iran to allow  U.N. inspectors unrestricted access to suspected nuclear sites  despite U.S. doubts Tehran would come clean on its own.
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Iran on Thursday said it plans to press ahead with construction of a heavy-water nuclear reactor the U.S. and its allies fear could be used to produce plutonium to build atomic weapons hours after the U.N. nuclear watchdog denied Tehran help in building it.
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Iran said Sunday its nuclear activities have not halted or slowed down, rejecting reports that it has not significantly expanded its uranium enrichment program this summer as planned.
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Threats and economic sanctions will not stop Iran's technological progress, President Mahmoud Ahmadinejad warned Saturday at a large parade of missiles and other weapons aimed at showing off the country's military might.
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West can halt spread of nuclear weapons by pre-emptive strike, say senior military strategists