http://www.newsweek.com/russian-state-hackers-could-have-caused-electricity-blackouts-us-1038760

Hackers working for a state-sponsored cyber-espionage unit with alleged links to Russia could have caused electricity blackouts in the U.S. last year after gaining access to some utility control rooms, a Department of Homeland Security (DHS) official disclosed this week.

Jonathan Homer, chief of industrial control system analysis at the agency, said that hackers “got to the point where they could have thrown switches” and mess with power flows, according to the Wall Street Journal, which first reported the news from a federal briefing on Monday.