[wtracy]

At the risk of wading into a pointless flame war, let's apply Occam's Razor.

First, public belief/interest in alien flying saucers has been mostly dead for decades. Performing a cover-up operation now would accomplish nothing.

Second, if the original flying saucer sightings truly were of extraterrestrial spacecraft (which I highly doubt) then nothing in these documents precludes these designs being based on those spacecraft. So, I expect this release to fuel the flames of the conspiracy theories, not cool them down.