Documents / Official release
This U.S. Department of War file collects Project Sign era checklists and incident summary sheets for incidents 101 to 172. The largest item is the 18 February 1948 explosion over Norcatur, Kansas. For it the file gathers witness statements, speculative letters from Norman G. Markham, and Dr. Lincoln LaPaz's view that it was a genuine meteorite fall with curious aspects. Other entries cover B-29 crews, a two-decked wingless object over the Netherlands, a Turkish rocket report, a Moscow sighting, and George Gorman's 1 October 1948 Fargo encounter.
From the source:Release of 2026-05-08 Incident: N/A, N/A. NARA Record Group 38, catalogue id 143685. Each of these incident summaries includes a "Check-List - Unidentified Flying Objects" that contains details about the incident. Many summaries also include witness lists or statements and other narrative reports or descriptions.
“Hill”8 pages
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## The B. F. Goodrich Company 1653 Hennepin Avenue Minneapolis, Minnesota 415 W. Rosser Avenue Bismarck, N. Dakota June 18, 1948 Col W. R. Clingerman U. S. Army Air Forces Wright Field Dayton, Ohio Refer - MCIAXO-3 Dear Sir: - In reply to your letter of June 15th in which there are several questions which you desire answered to the best of my ability - with reference to the object which I saw flying through the air between Plevna and Miles City Montana on the night of May 17th, I will answer them and give you a graphic description again with a little more elaboration than my previous letter - if that is possible. Question: - Did the entire object appear to be glowing, or did it give the effect of carrying lights. Answer: This thing seemed to be a ball of bright white light - and I could not make out if it was being carried or just what made it go - however, it did disturb me quite a little because after stopping to view it at the Powder River Bridge I could not hear motors humming such as an aircraft in these parts might have, and I therefore tried to find out just what it was by the use of my field glasses. (b) Question: - An estimate of the size of the object in comparison with some other known object. Answer - the size of the light which was very brilliant would indicate that it was fairly large compared with aircraft and I would say that this exceedingly bright light which was one light and not several was as bright as the headlight on a locomotive, only about three times that bright and without direction. By this I mean that this light simply glowed very bright and was not a directed light. (c) Question: - An estimate of the speed of the object in comparison with the jet type or conventional aircraft. Answer: This object flew at about twice the speed of any aircraft that Northwest Airlines planes fly because it would appear coming thro where I was traveling west on Highway #212 or #12 as we call it out here appearing only faintly first and then growing larger as it approached over the hills north of the highway - until it seemed to hang there off in the northwest of me brightly and then would turn south toward the highway where it became real bright and then would start back West again and fly out of sight. This thing did this several times - which actually got my goat - if I may put it that way. (d) Question: Did the object appear to be circling at random or did it follow a definite flight pattern. Answer: As have explained before - the object appeared first when
Official release, from the pursue collection. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 178 pages are in the text index: search them above, or from the library's search.