I once had some air force dude tell me something kinda crazy sounding, that goes along with what you just said. He told me there are military spaceships that are kinda hidden in plain sight. He said his experience with this was observing the US bailing out some Russians for some emergency or other. This was during the early Bush years. Classified? Who would believe you if you talked? He also said there were some downright odd technologies the Military had developed over the years but weren't entirely safe or useful. I remember a lot of it sounding like Star Trek grade stuff gone wrong.

One part of me wonders if we have that kind of technology, why not show it off? But on the other hand, there's a possibility that all this "pickled alien" business prevents us from needing to until we, well, need it.