Loose nukes

"In the case of Al Qaida, the 'red mercury' turned out to be radioactive rubbish," concluded Gavin Cameron, a professor of politics at Britain's University of Salford, in a paper on terrorist nuclear-proliferation activities.

Al Qaeda may have been gullible, but at least the group was subtle. Contrast their approach with that of the apocalyptic Japanese religious group Aum Shinrikyo, whose members were responsible for the release of sarin nerve gas in five Tokyo subway trains on March 20, 1995.

In the early 1990s, Aum actively recruited adherents from Russia's nuclear design facilities, as well as student physicists from Moscow State University. It purchased property in Australia from which it planned to mine natural uranium for enrichment - an arduous task beyond the resources of most nations. In 1993, Aum representatives sought a meeting with then-Russian Energy Minister Viktor Mikhailov for the express purpose of discussing the purchase of a nuclear warhead. (The meeting was denied.)

But Al Qaeda's and Aum Shinrikyo's nuclear dealings share at least two similarities that experts find worrisome. One is ample funding. At the height of its influence, Aum had an estimated net worth of $1 billion, obtained largely from co-opting the assets of its members. Al Qaeda's operations have bin Laden's personal fortune - inherited from his construction-magnate father - as seed funds.

The second similarity is persistence. Following Aum's path, Al Qaeda has apparently mounted a multinational, many-leveled effort to enter the nuclear club. In recent years, there has been a steady trickle of reports from experts in Europe and the Middle East who say they have been contacted by bin Laden associates and asked for help obtaining fissile material.

Last year, a Bulgarian businessman said he had met bin Laden himself, and had been offered a role in a complex deal to transship nuclear waste to Afghanistan via Bulgaria. This month, Gul Nazir, head of organic chemistry at Kabul University, said he had turned down offers from Taliban delegations to provide substances that could be used to help make chemical weapons and mine uranium.

Then there's the curious case of Sultan Bashiruddin Mahmood. An architect of Pakistan's nuclear program, he has traveled back and forth between Pakistan and Afghanistan in recent years, allegedly to advise the Taliban on the construction of food-processing plants.

At least one expert believes a radiological attack of a sort was part of Al Qaeda's original plan for Sept. 11. In a speech delivered to a meeting of the International Atomic Energy Agency, in early November, Mr. Cameron of the University of Salford said that it is likely that the target of the hijacked United Airlines Flight 93 was a US nuclear facility.

The hijackers' intentions are essentially unknowable, he admits, because they were stormed by heroic passengers, leading to the plane's crash in rural Pennsylvania. But the plane made a sharp turn near the Pittsburgh area, and rapidly lost height, before the passengers acted. Combined with unspecific FBI warnings about threats to power plants, this evidence may point to the terrorists' intended destination.

"It now appears that one of three nuclear reactors in southern Pennsylvania - Three Mile Island, Peach Bottom, or Hope Creek, Salem - may have been the real target," Cameron told the IAEA.

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