Vandals cut power to major cities

Authorities in Washington State are investigating a series of attacks on four power substations on Christmas Day that caused thousands of customers in the region to lose power and raised concerns once again about the nation’s power grid security. The attack comes just weeks after assailants shot at two substations in North Carolina, causing about 45,000 customers in rural Moore County to lose power for several days. After those attacks, federal regulators ordered a review …

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