Unheeded lessons of the 2003 blackout | Newsday

Unheeded lessons of the 2003 blackout | Newsday

It was a traumatic event that plunged 50 million people in the United States and Canada into darkness. On a hot summer afternoon 10 years ago this week, a cascading series of failures on the electric grid left parts of New York, New Jersey, Ohio, Pennsylvania, Maryland, Michigan, Massachusetts, Connecticut and Ontario without power.

What created all this mayhem? An overloaded and aging power line in Ohio that was knocked down by trees with too much foliage.

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