A former Israeli space security chief has announced that “Galactic Federation” of aliens has been in contact with the U.S. and Israel for years, but “humanity isn’t ready,” The Jerusalem Post reports.

Haim Eshed, who worked for the Israeli space program for almost 30 years, told Israeli newspaper Yediot Aharonot that the partnership between the U.S. and the Galactic Federation includes an underground base on Mars where Americans and aliens work together.

He also alleges that President Donald Trump is aware of the aliens and was close to revealing the truth, until he was warned not to disclose any information.

Eshed says Trump was warned by the Galactic Federation to not reveal any information because humans were not ready to understand “what space and spaceships are.”

Eshed said he was ready to inform the public of his findings because he had “nothing to lose.”

“If I had come up with what I’m saying today five years ago, I would have been hospitalized,” Eshed told Yediot Aharonot. “Today, they’re already talking differently. I have nothing to lose. I’ve received my degrees and awards. I am respected in universities abroad, where the trend is also changing.”

Eshed has released a book, The Universe Beyond the Horizon – conversations with Professor Haim Eshed, that go into detail about how aliens have prevented nuclear apocalypses and “when we can jump in and visit the Men in Black.”