Good article, thanks. As you said, there's no way that amount of money is 100% corruption. On the other hand, there's no way it's all being used for things outside the scope of national defense. Sometimes secrets must be kept - the titanium procurement for the SR-71 is one such example. Yes, it's absolutely shady, but that doesn't automatically mean it's improper.

And a scif (sensitive compartmented information facility) is a place that's secure enough to store/transmit/work with certain types of documents/information. It's just a type of room built or modified to a certain certification to allow the handling of classified stuff. Less nuclear bunker and more windowless room with a faraday cage.

I've been inside a few as a lowly navy e4, they're nowhere near as exciting as people seem to think. Including congressmen who don't know what they're talking about, or who had to take the GED 3 times before passing. It's a low bar.