Documents / Official release
This U.S. Department of War file, undated, holds checklist summaries of incidents 1 to 100 of unidentified flying objects reported in 1947 and early 1948. The first entries cover sightings of silver discs and spheres by officers and staff at Muroc Army Air Field on 7 and 8 July 1947. Next come the Portland, Oregon police reports of 4 July, a United Air Lines crew near Emmett, Idaho, and a set of 30 December flame and explosion reports from California and Nevada. The file ends with two Finnish sightings.
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.
Read from the scan by GLM-OCR; expect the odd misread word.
CHECK-LIST - UNIDENTIFIED FLYING OBJECTS Incident # 1. Date 29 June 47 2. Time 1645 3. Location Des Moines, Iowa 4. Name of observer Dale Bays 5. Occupation of observer Agent of Amazing Stories Magazine 6. Address of observer Box 12, Crocker, Mo. 7. Place of observation Not stated 8. Number of objects at first 5. then 13 9. Distance of object from observer Not stated 10. Time in sight Not stated 11. Altitude 1200 ft. Speed 300 mph 13. Direction of flight NNW 14. Tactics single file 15. Sound like an electric motor or dynamo 16. Size about 12 ft. thick & 175 to 250 ft. in diameter Color Dirty white Shape Between circle and oval - inverted saucer 19. Odor detected Not stated 20. Apparent construction Not stated 21. Exhaust trails Not stated 22. Weather conditions Not stated 23. Effect on clouds Not stated 24. Sketches or photographs None 25. Manner of disappearance Not stated 26. Romarks: None
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. 209 pages are in the text index: search them above, or from the library's search.