Electric Grid Threat Looms Nearly 7 Years After Unsolved ‘Insider’ Attack

At 12:58 a.m. on April 16, 2013, while the nation was reeling from the Boston Marathon bombings only hours earlier, an unknown number of suspects assaulted the Metcalf Transmission Substation in Santa Clara County, California, which feeds power to Silicon Valley. The attackers initially used heavy wire cutters to snip fiber-optic cables operated by AT&T in a…