The Wall Street Journal: “The breadth of the energy disruption suggests that some major rethinking deserves to be done about the vulnerability of America’s power grid. If an accident can shut down an entire U.S. region for half a day, imagine what well-planned sabotage could do. The U.S. has grown complacent as the memory of California’s blackouts in 2000 has faded. But especially in the Northeast, the U.S. is still operating on an energy supply and with a load-sharing grid that has very little room for error.”