I linked to this earlier, perhaps my comment was accidentally unshared, but I've found The Black Vault's archive of documents, photos and videos released in response to FOIA requests fascinating. Among the subjects covered are cloning, cryptology, UFOs, space, parapsychology, weather modification and mind control.
A lot of it is dry, such as a seven-page, single-spaced paper on coordinating autonomous robots. Some is lighter lighter in tone, such as a forty-three page document called "If Our Robots Are So Smart, Why Aren't We Rich?" and then there's old video archived or linked, like this minute from what sounds like a newsreel about Jet Packs from the 60s.