60 Minutes did an interesting piece within the past couple of weeks on cyberwarfare. They claim the Chinese Army and organized crime units in Russia, Europe and the America's are constantly hacking into our government computer networks. One of the things they said was a concern was that these hacks could affect, in particular, air traffic. So when I hear that a system just "went down", me thinks bigger things are afoot.
Apparently one such hack last year allowed the hacker to break into CENTCOM's mainframe and download three days worth of information regarding all intel, troop movements, communications, etc. Very scary stuff. The hacker(s) was never caught.