A sniper attack in April that knocked out an electrical substation near San Jose, Calif., has raised fears that the country's power grid is vulnerable to terrorism, the Wall Street Journal reports.
Nobody has been arrested or charged in the attack at PG&E Corp.'s Metcalf transmission substation. It is an incident of which few Americans are aware. But one former federal regulator is calling it a terrorist act that, if it were widely replicated across the country, could take down the U.S. electric grid and black out much of the country.
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