Correspondents say this is the International Atomic Energy Agency's toughest report on Iran to date.
BBC: UN nuclear agency IAEA: Iran 'studying nuclear weapons'
Iran is expected to attend another round of negotiations on 26 February in Kazakhstan.
Iran's supreme leader has dismissed a US offer of one-to-one talks on Tehran's nuclear programme.
It is estimated Iran will be able to send missiles to Central Europe within three years.
Mullen acknowledged that slow progress in Iraq is hurting U.S. credibility and emboldening Iran's regional ambitions.
Iran confirmed in mid-May that it was detaining Esfandiari and charged her later that month.
And for every person who wants to get out of Iran, a family is left behind.
The BBC's Bethany Bell, in Vienna, has examined the IAEA's latest quarterly report on Iran's nuclear programme.
BBC: UN nuclear agency IAEA: Iran 'studying nuclear weapons'
In 1987, Gangel covered the Iran-Iraq war as part of the Pentagon pool in the Persian Gulf.
Today Iran said it plans to resume work at one of its nuclear plants early next week.
Former Iranian President Akbar Hashemi Rafsanjani has accused Iran's leaders of incompetence and ignorance, an opposition website reports.
He pointed to the speed of Iran's nuclear work, Israeli military threats, and deepening sanctions, alongside the negotiations.
Ali Asghar Soltanieh said an IAEA report proves Iran is developing a nuclear program that will provide energy.
Iran had said it wanted Total to commit by the middle of the year.
Total, the French oil company, is the latest to voice its concerns about investing in Iran.
Iran has repeatedly accused Israel and the US of carrying out covert intelligence operations.
Herat province borders Iran and boasts a 5, 000-year history known for art and scholarship.
Talking Israel out of going to war with Iran would undoubtedly win him points.
He has ruled as an authoritarian and Shia sectarian and has allied himself with Iran.
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Iran has now released a video of the 15 detainees in which one of them speaks.
Where he has sought to restrain foreign governments Russia, Iran, North Korea he has been unsuccessful.
In Malaysia, exporters have stopped selling palm oil to Iran, because they cannot get paid.
However, he failed to mention any serious steps Iran would take to achieve that goal.
Both say they want to prevent Iran from gaining the technology to build a nuclear bomb.
The United States remains committed to a diplomatic solution, but the onus is on Iran.
Iran's semi-official Fars News Agency also reported that Khatami formally declared his candidacy on Sunday.
CNN: Top Iranian reformer to challenge Ahmadinejad, reports say
Iran's Hadi Saei won the men's 80kg taekwondo gold, defeating Italy's Mauro Sarmiento in the final.
Feb. 11 marks the 32nd anniversary of the revolution that overthrew the Shah of Iran.
Iran is the most ripe for democracy of all the countries in the region.
"Iran's delegation can't go home and say it is a good offer, " said the diplomat.
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