So, sure, liberals or progressives wouldn't reveal that if it were true, but no government would -- if only to avoid popular panic.
It is a little interesting though, that one of the first things Carter and Clinton wanted to do when they took over was get their hands on the UFO files.
Whatever (if anything) is in control of the real UFO and alien information must have a hell of a deterrent factor behind to stop a traitor like bubba krinton from selling out.
Gerald Ford, RINO harbinger, has also expressed fascination with UFOs. Fascination with UFOs is arguably the only reason why Dennis Kucinich, Ron Paul, and Mike Gravel have run for President.
There are several reasons why both right thinking people and liberal moonbats have good reason to study UFOs and the government reaction to them. To moonbats, extraterrestrials make an excellent excuse to attack anthropocentrism, and by their conception Christianity. Moonbats are also fascinated with advanced weapons of mass destruction, as those would make the body politic far easier to control.
To conservatives, UFOs represent complete lack of transparency on the government’s part, given that the government refuses to give proper explanations for the 1942 Battle of L.A. (even though extraterrestrials are likely not responsible for those events).