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.
“Hamilton”5 pages
## RESTRICTE About 7 miles out of Clarion, Iowa, observer saw an object shoot across the sky in front of the bus he was driving. It was followed by four more. the height appeared about 1200 feet. Observed stepped out of the bus which was facing east and noticed some dots in the sky approaching from the opposite direction. They were flying about the same altitude at a speed of about 300 MPH. These 13 objects flew in a single file. Roughly, the objects were between a circle and an oval in shape. In appearance they looked like an inverted saucer flying thru the air. The thickest part seemed to be about 12 feet. The diameter could have been anywhere from 175 to 250 feet. They were dirty white in color. The second group disappeared into the NNW sky in a matter of a few minutes. They made a noise as they passed overhead similar to an electric motor or dynamo.
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. 209 pages are in the text index: search them above, or from the library's search.