CIA Doc on Time Travel, Consciousness, and Existence of the Absolute (1983) [pdf]
If you go on some of the CIA FOIA tools you can also read about their experiments with astral projection. One of the more famous ones is about some guy astrally projecting on mars, in the past, and seeing aliens and buildings: https://www.cia.gov/library/readingroom/docs/CIA-RDP96-00788...The CIA back then was all kinds of fucked up. Doing illegal experiments on US civilians, installing dictators, and selling drugs. Makes you wonder what terrible shit they're doing now that hasn't come to the surface yet...