In the early 1960s, Chan Thomas wrote a book titled The Adam and Eve Story and attempted to have it published by Emerson House in Los Angeles. Soon after publishing the full issue, the CIA classified his book for 50 years. An FOIA lawsuit was filed against the CIA to release the book. In 2013, the CIA released a "cleansed" version of the original book (50 pages out of 240 original pages).
Why was this book classified?
https://www.cia.gov/readingroom/docs/CIA-RDP79B00752A000300070001-8.pdf
This is a fascinating topic. The eye of the Sahara aka the Richat Structure is theorized to be Atlantis. Wiped out around 12,500 years ago. Awesome topic to discuss, pyramids etc.