@Ole Jull

Entirely agree that military secrets shouldn't be held on a network connected to the Internet. And they aren't - read the article:

"Recently, malicious and determined hackers have accessed the Lab’s unclassified Yellow Network and removed a significant amount of unclassified material," according to a November 9 memo sent to employees. The lab's so-called red network, which is reserved for classified information, was not affected.

And to all the fanbois crying "if only they'd used Linux this could never have happened", I can do no better than to quote the master (Bruce Schneier):

"If you think technology can solve your security problems, then you don't understand the problems and you don't understand the technology." - Secrets & Lies