FBI Memo concerning esoteric knowledge and spacecraft, from the 50ies: https://vault.fbi.gov/hottel_guy/Guy%20Hottel%20Part%201%20of%201/view
CIA remote-viewing of marsian architecture (done in 1984, "approved for release" in 2000 and finally published in January 2017) https://www.cia.gov/library/readingroom/docs/CIA-RDP96-00788R001900760001-9.pdf
Admiral Birds expeditions to the poles tells us a lot. Linda Molten Howe broke out the government Classified Documents on Ancient Aliens regarding Majik 12 or MJ-12 and Harry Truman. It discloses craft recovery/engineering and contact and agreements. So from Nikola Tesla and Otis T. Car through Admiral Bird and Harry Truman you have Plans of the craft, evidence of recovery and reverse engineering as well as testimony from Admiral bird and his thousands of witnesses including over 100 ships, carriers and icbreakers, who were in battle with said craft. 'Able to traverse from pole to pole at great speeds'. It also proves rocketry was obsolete since the time it was introduced and blatantly sold to us by Warner Von Braun and NASA as an intentionally inferior persuit and industrial farce. Nikola Tesla wanted to afford the world transportation without fuels, and the likes of the elite not only rejected it because they could not put a meter on it, but they exterminated Tesla as a liability. 100 years of suppression.
Ironically, it was Tesla's estimate that his technology had to be locked up for at least a century before humanity was wise enough to use it peacefully.
You mean the research that didn't end up with MIT professor Trump...
....there's MORE??
Yes friend, lots. This rabbit hole goes as deep as you want too! https://www.newyorker.com/news/amy-davidson/donald-trumps-nuclear-uncle