Why are military computers with Top Secret material even connected to the Internet?
They aren't. There's a secret internet, called the SIPRNet. If that got hacked, there would be real trouble. Of course, that would have to be an inside job.
I'll bet you that a lot of these specs that are being stolen are of dubious value. Some may even be honeypots, designed to lure in hackers so we can learn more about them. That being said, it may still be possible to deduce classified information from a number of unclassified sources.
nope.
I can say they got into the NIPRnet.
maybe they wanted to read the jokes people send around? :)