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 31 May 1948
Incident # 129
2. Time 1320
3. Location Wilmington, North Carolina, 34°14' N, 77°57' W
4. Name of observer Mrs. H. D. Alspach
5. Occupation of observer N/S
6. Address of observer 709 South 6th
7. Place of observation Ground
8. Number of objects One
9. Distance of object from observer N/S
10. Timo in sightN/S
11. Altitude Awfully high
12. Spood Fast
13. Diroction of flight $ 9 0^{\circ} $
14. Tactics None
15. Sound N/S
16. Size As large as an arm, and about 3 feet long
17. Color N/S
18. Shapo Oblong
19. Odor detected N/S
20. Apparent construction N/S
21. Exhaust trails Emitted smoke
22. Weather conditions N/S
23. Effect on clouds N/S
24. Sketches or photographs None
25. Manner of disappearance N/S
26. Remarks: Mysterious sky object was sighted by Mrs. Alspach, her sister Mrs. Colvin, and Mrs. H.D. Hufham. It came at first at a fast 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.