National Geographic - 10/25/13, Patrick J. Kiger

Government and utility industry officials are so concerned, in fact, that in November, they will stage a massive emergency drill, called GridEx II,  that will involve thousands of utility workers, business executives, National Guard officers, FBI antiterrorism experts and government officials from the U.S., Canada and Mexico.  They’ll practice responding to a simulated failure of large parts of the electrical system across North America. (See related quiz: “What You Don’t Know About Electricity.”)