In the National Archives I found an interesting blurb in the Department of the Air Force files Relating to UAP, October 25, 1945–December 31, 1969. https://catalog.archives.gov/id/656595571 This specific interesting blurb: https://catalog.archives.gov/id/659965426 Two descriptions of UAP that are interesting that may exhibit one of the observable. It wasn't easy to find and earlier on in this document, theres only a brief mention of UAP. pg 85 of the Fifth Air Force Daily Intel Summary, June...

Look at the pictures. https://www.archives.gov/research/topics/uaps/photographs