Brazilian blackout traced to sooty insulators, not hackers

A massive 2007 electrical blackout in Brazil has been newly blamed on computer hackers, but was actually the result of a utility company's negligent maintenance of high voltage insulators on two transmission lines. That's according to reports from government regulators and others who investigated the incident for more than a year. In a broadcast Sunday night, the CBS newsmagazine 60 Minutes cited unnamed sources in making the extraordinary claim that a two-day outage in the Atlantic state of Espirito Santo was triggered by hackers targeting a utility company's control systems.

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