MAHDI SHUKUR OBEIDI is the Iraqi nuclear scientist in whose garden some centrifugue parts were dug up last year. In yesterday's New York Times, Obeidi explains the state of Saddam's nuclear program before the war:

What was really going in Iraq before the American invasion last year? Iraq's nuclear weapons program was on the threshold of success before the 1991 invasion of Kuwait - there is no doubt in my mind that we could have produced dozens of nuclear weapons within a few years - but was stopped in its tracks by United Nations weapons inspectors after the Persian Gulf war and was never restarted. During the 1990's, the inspectors discovered all of the laboratories, machines and materials we had used in the nuclear program, and all were destroyed or otherwise incapacitated.

[...] In addition to the inspections, the sanctions that were put in place by the United Nations after the gulf war made reconstituting the program impossible. During the 1980's, we had relied heavily on the international black market for equipment and technology; the sanctions closed that avenue.

Another factor in the mothballing of the program was that Saddam Hussein was profiting handsomely from the United Nations oil-for-food program, building palaces around the country with the money he skimmed. I think he didn't want to risk losing this revenue stream by trying to restart a secret weapons program.

[...] So, how could the West have made such a mistaken assessment of the nuclear program before the invasion last year? Even to those of us who knew better, it's fairly easy to see how observers got the wrong impression. First, there was Saddam Hussein's history. He had demonstrated his desire for nuclear weapons since the late 1970's, when Iraqi scientists began making progress on a nuclear reactor. He had used chemical weapons against his own people and against Iran during the 1980's. After the 1991 war, he had tried to hide his programs in weapons of mass destruction for as long as possible (he even kept my identity secret from weapons inspectors until 1995). It would have been hard not to suspect him of trying to develop such weapons again.

The Western intelligence services and policy makers, however, overlooked some obvious clues. One was the defection and death of Saddam Hussein's son-in-law, Hussein Kamel, who was in charge of the unconventional weapons programs in the 1980's.

[...] To the end, Saddam Hussein kept alive the Iraqi Atomic Energy Commission, staffed by junior scientists involved in research completely unrelated to nuclear weapons, just so he could maintain the illusion in his mind that he had a nuclear program. Sort of like the emperor with no clothes, he fooled himself into believing he was armed and dangerous. But unlike that fairy-tale ruler, Saddam Hussein fooled the rest of the world as well.

Was Iraq a potential threat to the United States and the world? Threat is always a matter of perception, but our nuclear program could have been reinstituted at the snap of Saddam Hussein's fingers. The sanctions and the lucrative oil-for-food program had served as powerful deterrents, but world events - like Iran's current efforts to step up its nuclear ambitions - might well have changed the situation.

Iraqi scientists had the knowledge and the designs needed to jumpstart the program if necessary. And there is no question that we could have done so very quickly. In the late 1980's, we put together the most efficient covert nuclear program the world has ever seen. In about three years, we gained the ability to enrich uranium and nearly become a nuclear threat; we built an effective centrifuge from scratch, even though we started with no knowledge of centrifuge technology. Had Saddam Hussein ordered it and the world looked the other way, we might have shaved months if not years off our previous efforts.

So what now? The dictator may be gone, but that doesn't mean the nuclear problem is behind us. Even under the watchful eyes of Saddam Hussein's security services, there were worries that our scientists might escape to other countries or sell their knowledge to the highest bidder. This expertise is even more valuable today, with nuclear technology ever more available on the black market and a proliferation of peaceful energy programs around the globe that use equipment easily converted to military use.

Hundreds of my former staff members and fellow scientists possess knowledge that could be useful to a rogue nation eager for a covert nuclear weapons program.

And this disturbing possibility may well be what's exactly happening, according to London's Daily Telegraph:

Syria's President Bashir al-Asad is in secret negotiations with Iran to secure a safe haven for a group of Iraqi nuclear scientists who were sent to Damascus before last year's war to overthrow Saddam Hussein.

Western intelligence officials believe that President Asad is desperate to get the Iraqi scientists out of his country before their presence prompts America to target Syria as part of the war on terrorism.

The issue of moving the Iraqi scientists to Iran was raised when President Asad made a visit to Teheran in July. Intelligence officials understand that the Iranians have still to respond to the Syrian leader's request.

A group of about 12 middle-ranking Iraqi nuclear technicians and their families were transported to Syria before the collapse of Saddam's regime. The transfer was arranged under a combined operation by Saddam's now defunct Special Security Organisation and Syrian Military Security, which is headed by Arif Shawqat, the Syrian president's brother-in-law.

The Iraqis, who brought with them CDs crammed with research data on Saddam's nuclear programme, were given new identities, including Syrian citizenship papers and falsified birth, education and health certificates. Since then they have been hidden away at a secret Syrian military installation where they have been conducting research on behalf of their hosts.

UPDATE. More on Obeidi in the AP.