The government has done a pretty good job of making the process very easy: https://www.foia.gov/
But, just like with ChatGPT, you'll likely have to do a bit of "prompt engineering" to get a specific document. "Give me all the stuff you guys got on UFOS1!!" will likely be less fruitful then "I am requesting the email correspondence between X and Y related to the documented observation of an atmospheric event occurring on ..."
In my experience these requests are taken quite seriously.
But, just like with ChatGPT, you'll likely have to do a bit of "prompt engineering" to get a specific document. "Give me all the stuff you guys got on UFOS1!!" will likely be less fruitful then "I am requesting the email correspondence between X and Y related to the documented observation of an atmospheric event occurring on ..."
In my experience these requests are taken quite seriously.