Originally published on Wed May 23, 2012 10:26 am
If you thought that the nation's electrical grid was designed to prevent a single, localized malfunction from triggering a blackout for millions of people, you'd be right.
But that didn't prevent that exact event from happening Thursday in San Diego, parts of Arizona, and Mexico's Baja peninsula. Phoenix-based Arizona Public Service Co. said the blackout started when a piece of monitoring equipment was removed at a substation in Yuma, along the border with Mexico.
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