"For years alien believers have claimed the US Government, and possibly others, have encountered visiting aliens, and allowed them to operate unseen in hidden underground bases, from where they research our planet.

In return for this, government’s assess the technology which allows them to get here."
https://www.express.co.uk/news/weird/907037/Pentagon-UFO-government-UFO-source-aliens-exist

"Retired Israeli general and space security chief Prof. Haim Eshed said during an interview with Israeli newspaper Yediot Aharonot last week that extraterrestrials have been in contact with the governments of the United States and Israel for years.

Eshed claimed U.S. President Donald Trump was on the verge of revealing this secret before the “Galactic Federation” asked him to remain silent, as the aliens are worried that humanity is not ready to learn about their existence yet."
https://www.breitbart.com/national-security/2020/12/08/retired-israeli-general-space-aliens-trump-not-expose-galactic-federation/

"The 87-year-old reportedly said, "There’s an agreement between the U.S. government and the aliens. They signed a contract with us to do experiments here. They, too, are researching and trying to understand the whole fabric of the universe, and they want us as helpers.""
https://www.tmz.com/2020/12/07/israeli-space-official-aliens-exist-galactic-federation-humans-not-ready/

"Paul Hellier, former Canadian defense minister: “Two aliens are working for the US government.”"
https://earth-chronicles.com/anomalies/the-government-of-the-united-states-is-working-aliens.html

"“On the show, Condor told of a deal the government made with the
aliens: ‘Essentially, the agreement says that we won’t disclose your
existence if you won’t interfere in our society, and we allow you to
operate from a designated base in the United States.’ It’s in the state
of Nevada, in an area called Area 51. Extraterrestrials have
complete control of the base. My understanding is that three
different aliens of the same species has resided in the U.S. from
1948 or 1949 until the present day."
https://www.unexplainable.net/ufo-alien/a-shocking-look-inside-the-government-alien-exchange-program.php