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.
14 GCA operator was, uh, sitting there looking in his scope and all of a sudden he saw these two objects come in. They were coming in about 4 or 500 miles an hour. And at the same time a C-47 was coming in, he was going to land his 47. Well, he noticed they were on a collision course, so he called the tower and said, 'Tell those two unidentified airplanes they're on a collision course with this 47.' So the tower just called in the blind... The tower said there's no other airplanes out there. The radar man said, 'Yes, there is.' The tower just called in the blind and said, 'Uh, you two unidentified airplanes, you're on a collision course with a 47.' And just as they said that, these two returns made a turn. Now, once again, have we got coincidence or have we actually got something? See, I mean it, uh... Do they speak English? ... So, that's about the only conclusion we can draw, they must speak English. But, uh, that's some of the things we run into. We run into a lot of that kind of stuff where we'll have a lot of small situations that all build up into a big one. And it might be just a coincidence. It might be, we may put our imagination into it unconsciously. Only we, we try to keep away from that. We try to stay right in the straight and narrow. I mean, we don't want to, uh, be influenced either way on this thing. They may be from Mars, but if they are, we don't want to think they are. We don't want to think they're all balloons. I mean, we try to stay right in the middle of the road. Now, we had a real interesting one from, uh, New Jersey, uh, around Sandy Hook and Fort Monmouth here not too long ago. These pilots in a T-33 chased something, and about 10 minutes later, all our radar stations in that area begin to pick these objects up going back and forth all over the skies. And we thought, 'Boy, this is it.' So we tore up there to find out, and boy, the story sounded real fine. These T-33 pilots saw this great big disc-shaped thing over there and he took out after it and he couldn't catch it. And then the radar stations begin to pick up these signals and they were clocking speeds up to 3,500 miles an hour and everything else. Well, it turned out that the pilots had seen a big balloon. It was larger than a normal weather balloon, had been launched at Fort Monmouth. And they were a little bit mixed up with their rate of closure and stuff like that and had seen a balloon. And the radar crews, the first radar crew had picked up a, probably just an ordinary aircraft, but they were giving a demonstration to a bunch of colonels and the operators got a little bit flustered on the whole thing and they couldn't lock in this automatic tracking, so they assumed the thing must be going about 3,500 miles an hour. And it turned out the reason they couldn't lock it in is they were just too excited and got a little bit fouled up on their procedures. And from then on, why they were picking up weather balloons, uh, with these radar reflectors hanging on them and everything else, and the students, incidentally, it turned out they were mostly student radar operators picking this stuff up. The, uh, headquarters had called in and hadn't explained anything. They just said, 'Get on your radar scopes and look for these mysterious objects floating around.' Well, that's all it took for these kids because, boy, they saw everything. Well, what at first appeared to be a very good sighting just all broke down when we get enough facts. Now
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.