Broken News: North Korea's Internet Service is Down.

North Korea experienced a widespread Internet outage on Monday, less than a week after the FBI accused the country of being behind the hack that forced Sony Pictures to cancel the release of 'The Interview.' The Internet blackout began sometime Monday morning Eastern Time, a U.S. official confirmed to NBC News. Two U.S. officials denied any U.S. involvement in the outage. It was not immediately clear what had caused the outage, which came after President Barack Obama promised that the United States would "respond proportionally" to what he said on Sunday was an "act of cybervandalism." 

The hack of Sony Pictures by a group calling itself the "Guardians of Peace," or GOP, forced the studio to cancel the planned Christmas release of the action-comedy, which centers around a plot to assassinate North Korean leader Kim Jong Un. While North Korea's elite might be affected by the outage, most of the country's citizens don't have access to the Internet. DYN Research conducts Internet performance tests around the world. It noticed the problem when it could no longer connect to North Korean websites. "It seemed like in the last 24 hours it was getting progressively worse until it went offline," Doug Madory, director of Internet analysis at DYN Research, told NBC News. "That means that nobody in the world can send any Internet traffic to North Korea, and they can't send anything out."

Report: An overwhelming number of Cyber-Attacks on America are coming from one particular army building in China

David Sanger, David Barboza, and Nicole Perlroth at the NYT are out with a huge report tonight on Chinese cyber-attacks on US companies.

The Times got their hands on an advanced copy of report by Mandiant, consequently the same cyber security firm the newspaper hired when it got hacked.

The details we have analyzed during hundreds of investigations convince us that the groups conducting these activities are based primarily in China and that the Chinese Government is aware of them.

Our analysis has led us to conclude that APT1 [Advanced Persistent Threat] is likely government-sponsored and one of the most persistent of China’s cyber threat actors.

Though the White House is "aware" of the Mandiant report, they come just short of naming the Chinese government, and one intelligence official told the Times with frustration, "There are huge diplomatic sensitivities here.”

“Either they are coming from inside Unit 61398,” Kevin Mandia, the founder and chief executive of Mandiant, told the Times in an interview last week, “or the people who run the most-controlled, most-monitored Internet networks in the world are clueless about thousands of people generating attacks from this one neighborhood.”
The article cites a report from cyber-security firm Mandiant (which can be downloaded here) which cites the existence of a building housing PLA Unit 61398.