Feds Eye Link to Private Contractor in Massive Government Hack

The hackers who recently launched a massive cyber-attack on the U.S. government, exposing sensitive information of millions of federal workers and millions of others, may have used information stolen from a private government contractor to break into federal systems.

http://abcnews.go.com/US/feds-eye-link-private-contractor-massive-government-hack/story?id=31717372