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Justin points to more news on electricity-loving worms. From the article:

The Slammer worm penetrated a private computer network at Ohio’s Davis-Besse nuclear power plant in January and disabled a safety monitoring system for nearly five hours, despite a belief by plant personnel that the network was protected by a firewall, SecurityFocus has learned.

[...]

The incident at the plant is described in an April e-mail to the Nuclear Regulatory Commission (NRC) from FirstEnergy, and in a similarly-worded March safety advisory distributed privately throughout the industry over the “Nuclear Network”, an information-sharing program run by the Institute of Nuclear Power Operations.

So this seems to be this incident I already wrote about. And that plant has a pretty bad history. The article continues:

The Davis-Besse incident was not Slammer’s only point of impact on the electric industry. According to a document released by the North American Electric Reliability Council in June, Slammer downed one utility’s critical SCADA network after moving from a corporate network, through a remote computer to a VPN connection to the control center LAN.

I have a baaad feeling about all this stuff…