More news from the middle east:
The present military build-up in the Gulf would allow the US to mount an attack by the spring. But the sources said that if there was an attack, it was more likely next year, just before Mr Bush leaves office.
Planning is going on, in spite of public disavowals by Gates. Targets have been selected. For a bombing campaign against nuclear sites, it is quite advanced. The military assets to carry this out are being put in place."
He added: "We are planning for war. It is incredibly dangerous."
Colonel Sam Gardiner, a former air force officer who has carried out war games with Iran as the target, supported the view that planning for an air strike was under way: "Gates said there is no planning for war. We know this is not true. He possibly meant there is no plan for an immediate strike. It was sloppy wording.
"All the moves being made over the last few weeks are consistent with what you would do if you were going to do an air strike. We have to throw away the notion the US could not do it because it is too tied up in Iraq. It is an air operation."
Mr Bush is part of the American generation that refuses to forgive Iran for the 1979-81 hostage crisis. He leaves office in January 2009 and has said repeatedly that he does not want a legacy in which Iran has achieved superpower status in the region and come close to acquiring a nuclear weapon capability. The logic of this is that if diplomatic efforts fail to persuade Iran to stop uranium enrichment then the only alternative left is to turn to the military.
Mr Muravchik is intent on holding Mr Bush to his word: "The Bush administration have said they would not allow Iran nuclear weapons. That is either bullshit or they mean it as a clear code: we will do it if we have to. I would rather believe it is not hot air."
He (Afshin Molavi, a fellow of the New America Foundation) is worried about "a miscalculation that leads to an accidental war".
The catalyst could be Iraq.
"If Iran escalates its military action in Iraq to the detriment of our troops and/or innocent Iraqi people, we will respond firmly"
George Bush, in an interview with National Public Radio http://www.guardian.co.uk/iran/story/0,,2010086,00.html