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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## CONFIDENTIAL
Witness observed very bright light in the sky southwest of Clinton County AF Base which appeared to be the complete wing of an aircraft on fire. When viewed thru field glasses from the Control Tower the object would gain and lose altitude very rapidly with barely any discernible forward or backward motion. At times it changed colors (from red to green, etc) At one time it disappeared behind the overcast but its light penetrated thru the overcast. At approximately 19:45 o'clock it began to move away from the field on a heading of 210 $ ^{\circ} $ and disappeared over the horizon at approximately 19:55. (1st acct)
NOTE: See also 48, 48a, 48b, 48d & 33, 33a, 33b, 33c, 33d, 33e, 33f and 30 and 32.
At the time of the sighting the weather was clear over the Base, with a SouthOWest wind which was moderate. There was an overcast in the SE which appeared to be a layer approximately 1000 feet thick. The height of this overcast was approximately 5,000 ft. Object seemed to be about 5 miles from the field at an altitude of from 15,000 to 20,000 ft. The object which appeared stationary at first resembled the complete wing of an airplane on fire. No beam of light was projected. After observing it with the naked eye for some five minutes, witness went to control tower and looked thru field glasses and then decided that it was not a comet or a falling star to his knowledge of astronomy. With the aid of the glasses the object appeared to go from an altitude of 15,000 to 10,000 feet without any noticeable forward or backward motion, and then back up to its original altitude very rapidly. This occurred some 3 or 4 times. When it moved a red light would dominate and change to a green light and then back to its original color. It then started to reced on a heading of $ 210^{\circ} $ going behind the overcast. However, the light was discernible thru the overcast. It then moved very rapidly away, stopping momentarily for 3 or 4 minute intervals and then disappearing over the horizon at 19L55. No sound was heard. No photographs were taken (From a signed statement second account)
CONFIDENTIAL 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.