Here’s a deeply scary report on Pakistan’s role as the spider in the center of the web of Islamic nuclear proliferation, and the activities of the “father” of Pakistan’s nukes, Abdul Qadeer Khan: From Rogue Nuclear Programs, Web of Trails Leads to Pakistan. (Hat tip: dennisw.)

Dr. Khan returned to Pakistan in 1976 after working in the Netherlands, carrying extremely secret centrifuge designs — a Dutch one that featured an aluminum rotor, and a German one made of maraging steel, a superhard alloy. He was charged with stealing the designs from a European consortium where he worked.

“The designs for the machines,” said a secret State Department memo at the time, “were stolen by a Pakistani national.”

The steel rotor in the German design turned out to be particularly difficult to make, but it could spin twice as fast, meaning it produced more fuel.

His accomplishments turned Dr. Khan into a national hero. In 1981, as a tribute, the president of Pakistan, Gen. Mohammad Zia ul-Haq, renamed the enrichment plant the A. Q. Khan Research Laboratories.

Dr. Khan, a fervent nationalist, has condemned the system that limits legal nuclear knowledge to the five major nuclear powers, or that ignored Israel’s nuclear weapon while focusing on the fear of an Islamic bomb. “All Western countries,” he was once quoted as saying, “are not only the enemies of Pakistan but in fact of Islam.”

In the years before Pakistan’s first test in 1998, Dr. Khan and his team began publishing papers in the global scientific literature on how to make and test its uranium centrifuges. In the West, these publications would have been classified secret or top secret.

But Dr. Khan made no secret of his motive: he boasted in print of circumventing the restrictions of the Western nuclear powers, declaring in a 1987 paper that he sought to pierce “the clouds of the so-called secrecy.”