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.
11 they seem to appear in January or in December and January, in that period between the years. And they coincide with a meteor shower that occurs at that time. I don't believe I know, remember the name of it is, but for a long time, they tried to tie them in with that meteor shower, but just recently now, within the last year, they've begun to occur more on a, over the whole year instead of coming at at one time. OSI, Dr. LaPaz worked for OSI in '49 on these and they tried to come up with a conclusion, they couldn't. They've also spent a lot of time trying to find any fragments and have never been successful. I mean, they've been able to triangulate these things and get a heck of a lot of reports on people who have seen them or seen one of them and then work their triangulation like they do on large meteors, but they've never been able to find any parts. They wanted us to fire to pick up, put a dust collector on a B-29 and try to fly through the area right after these things occurred, try to pick up any dust that they might have left in the upper atmosphere, but they didn't find anything at all that would indicate that anything unusual was going on. So, we're up against a stone wall on these things too. I mean, all we've got is just people's ideas. We've got no proof as to what they actually may be. Now, we've, one of our approaches on this thing is going to be the use of diffraction gratings on cameras. This is Dr. Kaplan's idea. He says that we can, and I mean, I shouldn't say he says, we know that we can take a very inexpensive camera and put a diffraction grating on it and give them to these guards around Sandia and White Sands and all these places where the guards are outdoors 24 hours a day. And every time they see something that's unusual, just point the camera at it and take a picture, and then he says that he can take the reading and match them up either by known objects or match them up in his lab and tell us what the composition is of this object that's emitting this light. Now, we haven't, that's just strictly in the planning stage now, we haven't done very much except Dr. Kaplan is now trying to figure out the cheapest camera that he can build for us and the most rugged camera so these guards can throw it around and still get some decent pictures of these objects. Another thing that we've done is recently we've briefed the Air Defense Command on this whole project and have got their cooperation in with their radar scope cameras. As I mentioned before, we have had quite a few unknown radar returns. These things have, the Air Defense Command radars tracked objects going anywhere from 1,000 up to about 3,500 miles an hour. We've never been able to determine, however, that these weren't malfunctions in the radar set or due to some type of atmospheric phenomena. We've tried to get the weather charts at the time or weather conditions at the time this phenomena has occurred and try to correlate that data and show that due to a certain type of weather condition that they had this type of return. Now, we haven't had too much luck on that angle, so now we're going to try to get radar scope cameras and get pictures of this stuff, and then we'll know. Before, we just had the radar observer's interpretation of what he saw on the scope. We think that with pictures, probably we can do a little bit more with this. Now, another step further than that, and we haven't done anything on this except talk about it, and it may get into the point where we are going to
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.