Credit to Reddit user mrrapacz for sharing this e-mail from the National Archive:
“Are you interested in seeing if the truth is out there? Help us transcribe a new UFO-related mission with thousands of records available for transcription. Records include civilian and military eyewitness reports, case files, transcripts, and interviews. Join the mission.”
As part of the National Archives’ staff ongoing declassification and digitization efforts, several more series relating to UFOs were added to the National Archives Catalog. You can explore these digitized records and more:
Roswell Report Source Files, 1987-1996
Case Files on Sightings of Unidentified Flying Objects (UFOs), 1953–1960
Moving Images Relating to “The Roswell Reports” Source Data Research Files
Project Bluebook Artifacts, 1952-1969
Project Bluebook Artifacts, 1947-1969
Project “Blue Book”, 1954-1966
Project Blue Book Administrative Files, 1947-1969