Why wont the American government disclose any information on UFO's or extra terrestrial life?

But.... they have. See Project Bluebook.

I think you should download and watch the "Men in Black" movies. Those movies are very instructive about the role the US government has played with regard to aliens. And according to these movies, the information you seek can be reliably found in places like "The National Inquirer" and other similar publications. There is no need to try to squeeze it out of the US government when such information is so readily available from the Inquirer and elsewhere. And did you know that many of the 'people' who work for the Post Office are actually aliens? I should have realized this sooner but the movies made it clearer to me.

Cheers!

Because there is nothing to disclose.

UFO/s fall into these categories:

1. Man Made

2. Acts of Nature

3. Asteroids or Meteorites. Venus has even been reported as a UFO.

E.T. DOES NOT EXIST.

They have: time and time again. They must be getting exasperated from telling us over and over that ufos are all misinterpretations of normal sky stuff, delusions, mirages or outright hoaxes. But some people are too closed minded to listen.

The best instruments ever built, and ever likely to be built have never detected any trace of "extraterrestial life". A rational person with at least a modicum of scientific literacy could see that we are alone. But of course the media begs to differ. So does Hollywood. So we are stuck with the media chant of "there's water, must be life. yada yada".

C'est la vie.

Cheers!

Remember the fictional Orsen Well's "War of the Worlds" radio broadcast in the 1940s. People started to panic. What would happen to society if a real announcement of real aliens was made to the public?

The same reason, other countries, have disclosed little information. Intelligent annalists have found few incidents that suggest any UFO were piloted by ET.

Because there is nothing to disclose! There is ZERO credible evidence that ETs have ever visited earth. Unless physics as we know it is seriously flawed, it is IMPOSSIBLE for anything with mass to reach or exceed the speed of light, which makes interstellar travel impossible. Sorry, reality sucks sometimes!