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.
15 maybe they'll all turn out to do that, but so far, we've got an awful lot of them that we can't even come close to explaining." • "I'd like to, at the risk of repeating, just sum up some of these points. One is, Lieutenant Ruppelt mentioned around 800 cases that we have in our files. We know that that's only a portion of the sightings that have been made. Those are the ones that have managed to be reported to some military base and then through channels get to us. You can read local newspapers almost anywhere in the country, and if you read them over a period of time, you'll find stories on these things that we have not heard of. We've even heard of them in military organizations that have not been reported because I think it's almost a case of the airline pilots that wonder if there isn't something peculiar. For example, I was talking to some people from SAC the other day, and they were telling me about a radar bomb scoring run of a B-29 out at St. Louis. And they were following the B-29 in to the initial point. The operator noticed this plane flying or an object at 48,000 feet. The B-29 was at 25,000 feet. He immediately thought, 'Well, that's possible.' I mean, double harmonics or something, and anyway, he explained it away in his own mind. Well, then the blip started descending on a collision course, and a quick check revealed that it was descending at a rate of something like 1,000 miles an hour. He got a little more concerned, still thought, 'Well, possibly this is either in the radar or in some atmospheric condition.' Well then when the thing broke off and made a turn and then another turn and took the course and disappeared, they just don't know what it is. We find on these radar sightings that you're just left pretty much outside. I mean, you can't really dig in. You haven't got anything because there's so many of them that can be explained as there's a possibility that it is something either in the atmosphere or in the set. We had one good one not too long ago, and one of our electronics people pulled out a textbook and, gee, there was a case written up in the textbook exactly what had been reported to us. A hovering object that made a rapid rate of ascent and then took off on a course. Well, such a thing has occurred apparently because of weather phenomena, been reported and pretty thoroughly written up. So we find that whole area of sightings, I mean we're just left without any answers. One point that was not brought out is our relationship with Battelle." • "Oh, yes, I forgot to mention... Battelle Memorial Institute. They're one of the contractors who do work for us and... (inaudible) ...They're always silent. They became interested in this when we pointed out to them one day that here's an area in which we've had a lot of problems, and we're looking for help. We don't know the answers. So, one of the things that they hope to do for us is make available to us people who are specialists in various areas. So if we get a case that calls for an astronomer, we can quickly get an astronomer to work on it. Another thing is possibly a clipping service that will bring in a mass of reports we don't have, and if any of them are worth following up, we can. But our problem is just getting facts. We don't have enough facts to do anything other than explain that 80% of these, roughly, are known objects, or possibly. As a matter of fact,
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.