John Greenewald Jr. [Black Vault] uses FOIA and finds loads of UFO material in President Obama's Presidential Library

https://www.vice.com/en/article/jgmnqd/obamas-presidential-library-has-thousands-of-files-on-ufos 

https://www.tweaktown.com/news/85090/thousands-of-ufo-files-are-tucked-away-in-presidential-library/index.html