Foreign Spies Hack US Power Grid

According to a report by the Wall Street Journal today, foreign spies have successfully hacked into the United States power grid and left behind malware. The intruders have likely been "breaking into" the system for the past couple of years in an effort to learn how the internal systems work. U.S. intelligence officials, not the utility companies themselves, detected many of the compromises, which did not do any damage. The officials cautioned that there was no immediate threat but that if there was a war, the hackers may try to "turn on" the malware left behind.
The responsible parties are believed to be from Russia and China, but officials from these countries have denied any involvement. The utilization of botnets and the ability of attackers to cover their tracks make it pretty much impossible to know for sure. Here's a link to the WSJ article.