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.
“Anderson”4 pages
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## RESTRICTED Mrs Hedstrom saw the first object traveling at a terrific rate of speed in a northeasterly direction. It was out of sight before Mr. Hedstrom & their neighbor Mrs. Shultz could see anything. While discussing this sighting all 3 saw 10 similar objects proceed rapidly in the same direction in the form of a triangle. As they were disappearing 3 of the objects on the left flank peeled off and proceeded in a more northerly direction. The remaining objects appeared to close ranks and proceeded on a NE course. Five minutes later they saw another group of 3 objects proceeding in the same direction in triangular formation. Three to 5 minutes another triangular formation of five or mix objects were observed going in the same direction. Then a few minutes later the three witnesses saw large group of objects (some 35 to 50 of them) flying in a triangular formation in the same direction. Approximately 20 or 25 minutes after this group of objects were observed similar objects were noted coming back over the city in a Southwesterly direction. Generally they were in groups of 3, 5 and 7 and followed each other at approximately 5-minute intervals. Mrs. Hedstrom then called Detective Richard A. Frazier of the Twin Falls Polic Dept., a next door neighbor who was accompanied by M. E. Rountree and Richard Scott also members of the Twin Falls Police Dept. They observed a group of about 12 objects flying an formation over the city in a southwesterly direction. Detective Frazier and Mr. Hedstrom stated that the objects were not meteors or comets as they flew on a level line and did not appear to drop. They thought they could not have been birds light as the objects appeared lighted from the inside. Said the lights were not a reflection of the city lights No other persons reported seeing the phenomena but Mr. Hedstrom and Mr. Frazier stated that it was purely accidental that they had seen the object. No one noticed any flames or anything except the glow of lights.
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.