A major US intelligence assessment has suggested Iran is not trying to develop nuclear weapons at present. Here is a compilation of reactions from around the world.
GEORGE W BUSH, US PRESIDENT
This report is not an "OK-everybody-needs-to-relax-and-quit" report.
This is a report that says what has happened in the past could be repeated and that the policies used to cause the regime to halt are effective policies.
Iran was dangerous, Iran is dangerous and Iran will be dangerous if they have the knowledge necessary to make a nuclear weapon.
STEPHEN HADLEY, US NATIONAL SECURITY ADVISER
The estimate offers grounds for hope that the problem can be solved diplomatically, without the use of force, as the administration has been trying to do.
And it suggests we have the right strategy: intensified international pressure, along with a willingness to negotiate a solution that serves Iranian interests while ensuring the world that it will never have to face a nuclear-armed Iran.
HARRY REID, US SENATE DEMOCRATIC MAJORITY LEADER
I hope this administration reads this report carefully and appropriately adjusts its rhetoric and policy vis-a-vis Iran.
The administration should begin this process by finally undertaking a diplomatic surge necessary to effectively address the challenges posed by Iran.
MAHMOUD AHMADINEJAD, PRESIDENT OF IRAN
This report... is a declaration of victory for the Iranian people against the great powers.
It is the final blow for the enemies of Iran.
This was a final shot to those who, in the past several years, spread a sense of threat and concern in the world through lies of nuclear weapons.
MANOUCHEHR MOTTAKI, IRANIAN FOREIGN MINISTER
It's natural that we welcome it when those countries who in the past have questions and ambiguities about this case... now amend their views realistically.
The condition of Iran's peaceful nuclear activities is becoming clear to the world.
MOHAMED ELBARADEI, DIRECTOR GENERAL OF THE INTERNATIONAL ATOMIC ENERGY AGENCY
Iran has been somewhat vindicated in saying they have not been working on a weapons programme, at least for the past few years.
The report gives me a sigh of relief because it is consistent with our assessment...
It's a window of opportunity because it gives diplomacy a new chance.
MARK REGEV, SPOKESMAN FOR ISRAELI PRIME MINISTER
We believe that the purpose of the Iranian nuclear program is to achieve nuclear weapons.
There is no other logical explanation for the investment the Iranians have made in their nuclear program.
EHUD BARAK, ISRAELI DEFENCE MINISTER
It's apparently true that in 2003 Iran stopped pursuing its military nuclear programme for a time. But in our opinion, since then it has apparently continued that programme.
We cannot allow ourselves to rest just because of an intelligence report from the other side of the Earth, even if it is from our greatest friend.
DAVID MILIBAND, BRITISH FOREIGN SECRETARY
The report ... is important in two respects.
First, it confirms that there remains a serious enrichment problem, enrichment of uranium being a potential source of nuclear weapons.
Secondly, it shows that diplomacy can work and it is the diplomatic track and the continued engagement on that track that United Kingdom efforts are focused.
PASCALE ANDREANI, FRENCH FOREIGN MINISTRY SPOKESWOMAN
It appears that Iran is not respecting its international obligations.
We must keep up the pressure on Iran ... We will continue to work on the introduction of restrictive measures in the framework of the United Nations.
JOHN BOLTON, FORMER US AMBASSADOR TO THE UN
That such a flawed product could emerge after a drawn-out bureaucratic struggle is extremely troubling.
While the president and others argue that we need to maintain pressure on Iran, this "intelligence" torpedo has all but sunk those efforts, inadequate as they were.
Ironically, the NIE opens the way for Iran to achieve its military nuclear ambitions in an essentially unmolested fashion, to the detriment of us all.