I guess I'd have to say "so what?"<p>In the '85-86 time frame, I worked at McDonnell Douglas Aerospace Company (R.I.P.) on the Harpoon anti-ship missile. It wasn't an overly complicated missile or system, but there were still aspects of the design that Just Didn't Make Sense. Designed in 1970-72, by 1984 docs and institutional memory didn't cover everything any more. Bigger, more complicated, older systems will have even more of the "Just Don't Make Sense" problem.<p>If Chinese hackers steal some version of some weapons system docs, they're mainly going to be confused by it. Unless they have every subsidiary piece of information (Mil-Standards for everything from bolts to lubricants), test results, and design presentations, and at least some of the design information about interfacing systems (bomb racks, for the Harpoon example, or perhaps bolt patterns on the decks of ships) the engineers who get the docs will mainly spend their time puzzling over gaps in the docs.