Joint Strike Fighter designs stolen

According to the Wall Street Journal, the Pentagon needs to overhaul its computer system:

Computer spies have broken into the Pentagon's $300 billion Joint Strike Fighter project -- the Defense Department's costliest weapons program ever -- according to current and former government officials familiar with the attacks. .... [T]he intruders were able to copy and siphon off several terabytes of data related to design and electronics systems, officials say, potentially making it easier to defend against the craft.