Documents / Hearing transcript
This declassified transcript, released by the Office of the Under Secretary of War, records a March 1952 presentation by Captain Edward J. Ruppelt on the Air Force's reorganized UFO investigation. Ruppelt reports that about 20% of roughly 800 cases remain unexplained and notes clusters of reports near Los Alamos, Albuquerque and Oak Ridge. He discusses the Lubbock lights photographs, the Phoenix 1947 photograph and the Mantell case. He concludes that the Air Force has no firm evidence about what the objects are.
From the source: Release of 2026-09-18 Incident: 3/26/52, Boston, Massachusetts. This document is a transcript of a March 1952 presentation by Captain Edward J. Ruppelt outlining the U.S. Air Force’s reorganized investigation into unidentified flying objects (UFOs). The presentation previews prospective technical methodologies, such as diffraction-grating photography and radar-scope synchronization, that were subsequently incorporated into Project Blue Book, a U.S. Air Force program active from 1952 to 1969 that investigated the nature and origin of UFOs. Ruppelt explains that out of approximately 800 historical cases reviewed by the Air Force, approximately 20% remained unexplained after technical analysis. These unresolved reports were sourced from credible military personnel, commercial pilots, and other qualified technical observers. He highlights geographic report concentrations around sensitive national security and nuclear weapons installations (including Los Alamos, Albuquerque, and Oak Ridge National Laboratories) and notes recurring anomalous characteristics, including silent high-speed flight and radar detections indicating unconfirmed air speeds between 1,000 and 3,500 miles per hour. Emphasizing that the Air Force found no conclusive evidence regarding the nature or origin of the phenomena, Ruppelt underscores the national security need for a systematic physical data collection effort to better evaluate these sightings.
19 newspapers surpass the Air Force in their intelligence channels. They're good. I mean, there's just no getting around it." (Inaudible talk about Mr. Davis and the President) • "Well, I actually, it goes a little further than that. I mean, it's a wonderful ally. I think the project has varied in its handling a lot just through a difference of opinion or, you know, changes in opinion. There's been great interest in it and then it would fall away, not too much interest, and then great interest. And that's officially too, as well as the public. We feel that by going right down the line and taking every case we get and trying to get additional facts and encouraging anybody and everybody to give us information, there are a lot of groups that are interested in this. There's a, I don't know whether any of you read the Time article a few weeks ago on the saucers. Well, there's a group out on the West Coast that's in their spare time trying to get all of these cases they can to work on. We feel that that group, if we're quite frank with them, would be very cooperative and help us. I mean, we're not trying to hide anything, we're trying to get help. You do have a problem and how far you go publicly, but I think possibly this Life type article will help if they, if they publish what we expect." End of recording; nothing follows.
Hearing transcript, from the pursue collection. The PDF is mirrored here; the original link is above. 19 pages are in the text index: search them above, or from the library's search.