Documents / Report
This U.S. Air Force compilation, released by the U.S. Department of War, holds numbered checklists and survey sheets for flying object incidents 1 through 100. It covers sightings by officers, test pilots and civilians at Muroc Army Air Field on 7 and 8 July 1947, and sightings by Portland, Oregon police on 4 July 1947. It also includes fireballs seen over California, Nevada and Oregon on 30 December 1947, a Houston fireball, and Finnish reports from January 1948.
From the source:Release of 2026-06-12 Incident: United States. 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.
About 9 o'clock, well after dark, Lt Col F. L. Walker, Jr. GSC. of the Scientific Branch, Research Group, saw a low flying object appear over the top of a barn to his left traveling in an absolutely straight line in an arc of about 70° moving from north to south. The object appeared as a bright orange glow of flame and left behind it a long, straight, narrow white streak of flame similar to the streak left by a tracer bullet and itself, covering an arc of approximately 20° or 30°. There appeared to be a fine mist of smoke trailing behind this streak which vanished very quickly. The object took about 3-4 seconds to cover the arc of 70° and then simply vanished in mid air. The path traveled was absolutely horizontal. Witness states he never observed a comet which acted in this manner and was of the opinion that he had sighted a "flying cancer".
Report, 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. 253 pages are in the text index: search them above, or from the library's search.