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Utility officials seek to learn why safeguards failed in blackout

Sep 9, 2011 11:16:00 PM - latimes.com
The outage left 4 million people in the dark. Security experts say the incident highlights the grid's vulnerability.

The failure of a single piece of equipment in Yuma, Ariz., ignited a massive blackout that left more than 4 million people without power, baffling utility officials and highlighting the vulnerability of the U.S. electrical grid.

USA, California: (Latest Stories)