Russian hackers who penetrated hundreds of U.S. utilities, manufacturing plants and other facilities last year gained access by using the most conventional of phishing tools, tricking staffers into entering passwords.
By Colleen Long, Associated Press
When hackers sent out a bogus tweet from the Associated Press' Twitter account, the financial markets took a minutes-long nosedive. For more on how social media affects our world, NewsHour political editor Christina Bellantoni talks to Daily-Download.com's Lauren Ashburn and…
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