In his assessment of the stand-off between Iran and Western powers over its nuclear programme - which Tehran argues is for peaceful and civilian purposes - Mr Kissinger called for "serious" negotiations on both sides to look for solutions.
Many of the signers of the Hagel letter also appeared in another open letter to Mr Obama - this one on Iran - published that same day, further bringing to light Tehran's centrality in these debates.
Officials at the Swiss Embassy -- which represents the U.S. interests in Iran because Washington and Tehran do not have formal relations -- said earlier this week they had spoken to Iranian officials.
Canadian authorities allege the suspects Chiheb Esseghaier, 30, and Raed Jaser, 35, had "direction and guidance" from al-Qaida members in Iran, though there were no claims the planned attacks were state-sponsored by Tehran.
However, if the match ends in a draw, Iran -- who beat the United Arab Emirates 1-0 in Tehran on Wednesday -- can qualify with an unlikely victory over South Korea in Seoul.
The West fears that Iran seeks nuclear weapons - a claim denied by Tehran.
The US and its allies suspect Iran of secretly trying to build a nuclear weapon - something Tehran strongly denies.
Iran's internal crisis also paralysed decision-making in Tehran and so killed a confidence-building deal that might have created more time for nuclear diplomacy.
Russia has been touting its proposal to produce nuclear fuel for Iran as a way of defusing Western worries that oil-rich Tehran is secretly developing an atomic weapons program.
TEHRAN, Iran (CNN) -- A senior member of an Iraqi opposition group based in Iran denied U.S. claims that his group's military wing operating in Iraq receives training in Iran, according to Iran's state-run news agency.
He added that Iran was actively supporting Hezbollah's involvement - a claim denied by Tehran.
Cameron's spokesman, Jean-Christophe Gray, said the prime minister and Kerry also "reiterated their shared determination to prevent a nuclear-armed Iran" ahead of talks between world leaders and Tehran in Almaty, Kazakhstan, this week.
Police have not been given permission to use firearms in confronting protesters, Tehran Police Chief Azizollah Rajabpour told Iran's semi-official Mehr news agency.
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He worked closely with the White House in the final months of his tenure at the IAEA to try to forge an agreement with Iran that would have seen Tehran ship out the majority of its low-enriched uranium to a third country.
Instead, Mr. Ellison, who already had a visa to enter Pakistan and stayed behind in Tehran, was forced to head for the Pakistan-Iran border without the other two.
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He said the solution with Iran was "not military", and progress with Tehran depended on international co-operation.
The United States, Britain and other Western nations have long believed Iran's nuclear programme is aimed at developing atomic weapons - but this is rejected by Tehran.
The report released Monday presents evidence that Iran halted its nuclear program in 2003 and reverses a previous assessment that Tehran re-started that program of uranium enrichment in 2005.
With Tehran, the EU has presided over six-power talks on Iran's nuclear activities.
French authorities are now demanding that Iran drop all charges against Reiss and Nazak Afshar -- an employee of the French embassy in Tehran who was released August 8, the statement from Sarkozy's office said.
Straw will fly from Jordan to Tehran on Monday, becoming the highest-ranking British minister to visit Iran since the 1979 Islamic revolution.
Munich, Germany (CNN) -- Indirect talks over Tehran's nuclear program will resume this month, Iran's foreign minister announced Sunday at a security conference in Germany.
Jalal Sharafi, deputy secretary of the Iranian Embassy in Baghdad, arrived in Tehran a few hours after his release, according to Iran's semi-official FARS news agency.
In fact, American diplomats are talking about resuming direct talks with Iran over Iraq, and even of sending the first American diplomats to Tehran since the 1979-81 hostage crisis.
President Ahmadinejad made his space-travel offer during an address to scientists on Iran's national day of space technology in Tehran, state media report.
U.S. and European officials are particularly concerned about the presence at the Tehran signing of the head of the Atomic Energy Organization of Iran, Fereydoun Abbasi-Davani.
Study group co-chairman James Baker acknowledged Iran's likely unwillingness to cooperate much, revealing he had already approached Tehran about the subject.
The New York Times coverage has already been able to piece together a fascinating study of the twists and turns of US policy towards Iran and how this relates to Saudi-China relations - guaranteed oil deliveries were offered if Beijing cut its links with Tehran - and the US-Russia debate on missile defence.
The saber-rattling from Tehran has come in response to moves toward new sanctions by Western nations aimed at Iran's nuclear program.
With the U.S.-dollar financing system out of bounds for Iranian companies, India and Iran have begun a barter system in which Tehran accepts Indian rupees in payment for crude oil.
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