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.
CHECK-LIST - UNIDENTIFIED FLYING OBJECTS 1. Date 9 Jul 48 Incident # 139 2. Time 2147 3. Location North end of Osborn, Ohio 4. Name of observer Clarence Glasebrook, 1st Lt., USAF, Hq AMC (MCIAXO-4) 5. Occupation of observer ATI Investigator 6. Address of observer Hq AMC (MCIAXO-4) 7. Place of observation ground 8. Number of objects one 9. Distance of object from observer N/S 10. Timo in sight Appeared 3 times each time being 1-2 second duration Altitude 3000 to 4000 feet Speod between 500 & 600 13. Diroction of flight west (east to west) Tactics Made intermittent appearances at regulated intervals Sound None 16. Size could not be estimated 17. Color pale yellowish white (luminous) Shapo N/S 19. Odor detected N/S 20. Apparent construction N/S Exhaust trails None 22. Woathor conditions Clear w/quarter moon in the East-Southeast. Effect on clouds N/S Sketches or photographs None 25. Manner of disappearance Suddenly at angle of approx. 70° to horizon in front of observato who was looking north Lt. Glasebrook was a reconnaissance pilot in World War II.
Official release, from the pursue collection. The PDF is mirrored here; the original link is under it. The text was read from the page images by an OCR model; expect the odd misread word. 178 pages are in the text index: search them above, or from the library's search.