The Condon Report, funded by the U.S. Air Force, was published in 1968 and suggested continued study of UFOs would yield no scientific discoveries. Buried in the report, though, are three “unidentifieds” determined to be UFOs seen by astronauts in Earth’s orbit in 1965.
Sources in order of mention
R.C. Henry paper and memos: https://documents.theblackvault.com/documents/ufos/ufodocsnasa.pdf
Condon Report with missing chapter: https://documents2.theblackvault.com/documents/ntis/CondonReport-Complete.pdf
NTRL search: https://ntrl.ntis.gov/NTRL/
DTIC version with missing pages: https://apps.dtic.mil/dtic/tr/fulltext/u2/680975.pdf