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Electricity Grid in U.S. Penetrated By Spies

By

Siobhan Gorman

Updated April 8, 2009 11:59 p.m. ET

WASHINGTON -- Cyberspies have penetrated the U.S. electrical grid and left behind software programs that could be used to disrupt the system, according to current and former national-security officials.

The spies came from China, Russia and other countries, these officials said, and were believed to be on a mission to navigate the U.S. electrical system and its controls. The intruders haven't sought to damage the power grid or other...

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