If you have top secret designs for weapons of war perhaps it would be prudent not to place them on remotely accessible servers:
Designs for many of the nation’s most sensitive advanced weapons systems have been compromised by Chinese hackers, according to a report prepared for the Pentagon and to officials from government and the defense industry.
Among more than two dozen major weapons systems whose designs were breached were programs critical to U.S. missile defenses and combat aircraft and ships, according to a previously undisclosed section of a confidential report prepared for Pentagon leaders by the Defense Science Board.
I do hope this information gets made publicly accessible so we can all find out what those secretive defense contractors and the military are up to.