The Black Vault, which publishes declassified data, has posted on its website an impressive archive of CIA documents related to UFOs. The founder of the project, John Greenwald, says that he received all the documents by official means from the hands of the organization's employees. The CIA claims that they have nothing else, but it is not possible to verify this statement.
It was possible to obtain information thanks to the Law on Freedom of Information, and the process itself was launched at the turn of the 70-80s. last century. The representatives of the special services had to admit that the public ultimately has the right to find out the secrets of the government, but the process of transferring information itself is not really regulated. According to Greenwald, he spent 25 years in endless meetings, disputes and bickering with the CIA, until he finally got what he wanted.
But not everything is so simple - the researcher was handed a box with about 10, 000 printed sheets of very low quality. I had to scan them manually, something could not be disassembled at all, many documents were scattered. The CIA used the rather outdated .tif format, so software processing is also difficult. Ufologists don't have to talk about a gift, it's more like trying to get rid of garbage in order to get rid of annoying researchers. However, there are also enough mysterious stories there.