Is the price of second-hand computers about to plunge in Iran? Those in its nuclear facilities have been infected by the Stuxnet worm, an ingenious cyber-weapon seemingly designed specifically to sabotage uranium-refining by disrupting centrifuges' industrial-control systems. On November 29th President Mahmoud Ahmadinejad admitted Stuxnet had hit "a limited number" of the centrifuges. He had previously said that only administrative machines at nuclear facilities had been infected. The International Atomic Energy Agency reported a few days earlier that engineers at Iran's Natanz plant had stopped feeding uranium into its centrifuges, but Iran said it restarted the process six days later, iaea figures also showed the refining was less productive.
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