How China could have hacked the U.S. government in 10 steps

The four million federal workers who may have had their personal information hacked likely woke up this morning with a dominating question: How did this happen?

U.S. investigators believe Chinese hackers are responsible for the massive security breach at nearly every federal government agency, a law enforcement source and another US official told CNN on Thursday. The national security community is now working under the assumption that the Chinese have h