Government officials seem to imply that the leak was on behalf of defense contractors (and in some cases sub-contractors), and not specifically themselves. It just goes to show that if you want something done right, you really have to do it yourself.
Privately, U.S. officials say that senior Pentagon officials are frustrated by the scale of cybertheft from defense contractors, who routinely handle sensitive classified data. The officials said concerns have been expressed by Gen. Martin Dempsey, chairman of the Joint Chiefs of Staff, and Adm. James A. Winnefeld Jr., the vice chairman, as well as Gen. Keith Alexander, director of the National Security Agency.
In an attempt to combat the problem, the Pentagon launched a pilot program two years ago to help the defense industry shore up its computer defenses, allowing the companies to use classified threat data from the National Security Agency to screen their networks for malware. The Chinese began to focus on subcontractors, and now the government is in the process of expanding the sharing of threat data to more defense contractors and other industries.