In American ufology, there is a special section dedicated to the Black helicopter phenomenon. As a rule, such helicopters are seen by accompanying UFOs and there are no identification marks on them. And they move most often almost silently.
It is believed that these are special military helicopters and they themselves serve as a symbol of a conspiracy between aliens and the US government, which cooperates with aliens and creates aircraft using extraterrestrial high technology.
In the United States, this phenomenon has been observed since 1970, and later they were observed in some other countries (friendly with the United States).
The most famous incident with black helicopters is probably the Cash Landrum incident, when many military helicopters circled over a giant diamond-shaped UFO. It was 1980 near Houston, Texas. UFO observers bystanders received multiple burns and other injuries as if from radioactive radiation.
However, among these stories there is a subcategory, when these very black helicopters changed their shape and turned into a scattering of balls, into a classic UFO disk or blinding lumps of light.
And then there is a completely different theory about black helicopters, that they have nothing to do with people, but are one of the strangest forms of camouflage of alien ships.
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The city of Dulce, New Mexico, has long been famous among UFO scientists as a large secret underground UFO base. It is believed that aliens are conducting genetic experiments on abducted people on this base and that the US authorities are aware of this and either cooperate with them or adhere to some kind of neutrality, realizing that they cannot defeat them.
In 1982, a resident of Dulce named Bruno saw a large group of black helicopters over the desert area of Archulet Mesa, where the base was rumored to be.
And right before Bruno's eyes, all the helicopters changed shape and turned into brightly shining round objects. The man was shocked by what he saw and for all the years he believed that UFOs simply disguise their ships under terrestrial transport.
In 1993, ufologist Ray Bosch met with two physicists from the Department of Defense. They told him that they are working in a secret program and have contacts with beings that are officially called "non-human entities" (Non-Human Entities).
At the same time, they themselves were not sure that these "inhuman entities" were aliens, in their opinion they were demons from a place similar to Hell.
Physicists, in particular, spoke about black helicopters, which they called the aircraft of these "entities". And these devices, according to them, patrolled various places and were associated with kidnapping and cattle mutilation.