Computer virus made in USA/Israel shuts down Iranian nuclear plant

Computer expert says US and Israel  behind Stuxnet worm that was infected the Iranian nuclear power pant and forced Iran to unload the nuclear fuel rods.
http://www.spacewar.com/reports/Computer_expert_says_US_behind_Stuxnet_worm_999.html

The malicious code was crafted to stealthily take control of valves and rotors at an Iranian nuclear plant, according to Langner.
"It was engineered by people who obviously had inside information," he explained. "They probably also knew the shoe size of the operator." "The idea here is to circumvent digital data systems, so the human operator could not get there fast enough," Langner said.
"When digital safety systems are compromised, really bad things can happen -- your plant can blow up.