How much is the research on alien technology blocked in the United States?

There is no need to panic about evidence, because now you see, online, in the news, in the newspaper, where is nothing new? With these things, there are bound to be people taking photos with evidence, and there are many such people, so don't worry that the evidence will come sooner or later, unless they really don't engage in secret scientific and technological research, they will definitely leak the clues. In addition, if they study the inside and plan in a very secret place, there must be internal related personnel, and those personnel can't have any contact with the outside world before completing their personal lives, so there will be agents sneaking in. I'm afraid there are two different opinions. It is said that this is a UFO. It may be said by some countries that are against the United States that the United States is conducting experiments or may be an experimenter. But in order to protect its own interests, the United States has fabricated many rumors about UFOs, so who should you trust and only trust your intuition.