“When a serious cyberattack against the U.S. begins, at first you’ll blame the weather, or an accident, or corporate incompetence. It’ll be a power outage that lasts a few hours at most. But things will start to get more unsettling when reports trickle out that the blackout is the work of hackers, most likely connected to the Russian government.”
Source: The Next Big Hack Could Turn America’s Lights Off – Bloomberg