Why did the commanders consider the eyewitnesses reliable?

The document mentions observers deemed suitable for providing sightings but does not explain why.

Was any debris found?

The documents do not describe any debris that proved the existence of the objects.

Reports of Evading Objects Troubled the Air Force

Q: Did the military determine that there were objects in the sky?

The command determined that the reports described a real phenomenon, not imagination or a fabricated story. It did not determine what the objects were.

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Anomalies and points of interest

AMC's 23 September 1947 opinion (Twining) explicitly classifies the phenomenon as 'real and not visionary or fictitious' and lists controlled/evasive behavior, formation flights of 3-9 objects, speeds normally above 300 knots, and a rare 'substantial rumbling roar' as observed characteristics.
AMC explicitly raises three competing hypotheses with equal seriousness: (1) domestic high-security project unknown to AC/AS-2 or AMC; (2) lack of crash-recovered physical evidence; (3) foreign nation with possibly nuclear propulsion 'outside of our domestic knowledge'.
The 30 December 1947 directive sets the project's code name as 'Sign' with priority 2A and classification 'Restricted' — documentary moment of Project SIGN's chartering.
A Moscow military attache report (9 June 1947, ID V-32291-S) is cited as claiming 1,600 Horten VIII-derived six-engine pusher flying-wing bombers were being built for the Soviets, used in the same memo as supporting context for the Loedding Flying Disc analysis.
Wright Field's resident German scientists are used as a check on a Lionel Shapiro newspaper claim about German weapons work in Spain — they say no important German scientists are working in Spain.
An alleged Japanese radar-station 'Flying Saucer' sighting is referenced (5 Sept 1947 conference) but no details survive in this file beyond AMC's 24 Sept 1947 request for information.
Garrett's 22 Aug 1947 memo describes a throttleable liquid-rocket-like 'blue-brown haze' exhaust trail — an unusual technical signature compiled from multiple 1947 reports.
A 5 Aug 1947 reference form indicates AC/AS-2 requested an FBI investigation on the background of certain witnesses to 'Flying Discs' (filed 333.5 Investigation).
McCoy notes (18 Nov 1947) that 'Comments of Headquarters, Air Force on these letters have never been received by this Command' despite continued reports — institutional friction documented in the file.
Mrs. Merchant's theory routes Soviet-origin flying-disc speculation up to general-officer level (Brentnall) before being closed.

Commanders in the US Air Force received reports of objects in the sky. In September 1947, they examined the testimonies and tried to understand what the people who reported them had seen.

The commanders concluded that the reports described a real phenomenon, not imagination or a fabricated story. But that didn't mean they knew what the objects were. According to the reports, they also appeared to evade aircraft and remote detection devices.

Objects Flat on the Bottom and Domed

The assessment was based on reports from conversations with eyewitnesses and initial military investigations. The reports described objects that were round or elliptical, flat on the bottom, and domed on top.

Some eyewitnesses described several objects flying together in a structured formation. They said the objects moved at high speeds and sometimes performed maneuvers that seemed designed to evade aircraft and radar — a device that detects objects remotely.

The commanders did not present the testimonies as proof of the objects' identity. They wrote that the descriptions indicated something real but did not determine who or what operated it.

New Reports Also Caused Concern

In December, the US Air Force wrote that additional reports had come in from observers deemed suitable for providing such sightings. These new reports continued to worry the command.

The document does not explain why these observers were considered suitable, or exactly what they saw. It does state that military personnel continued to collect and examine the reports. The command also requested a systematic investigation of the phenomenon.

What Remains Unknown

The documents do not identify the objects, nor do they describe any recovered debris that proved their existence. The command raised the possibility that some reports stemmed from meteors — pieces of rock or dust that burn up and are visible in the sky.

Descriptions remained of objects that flew together and appeared to evade. The military believed there was something real in the reports, but it had no single piece of debris to explain what the eyewitnesses saw.

Reports of Evading Objects Troubled the Air Force · Aliens

Reports of Evading Objects Troubled the Air Force

Incidents in the document

Quotes from the file

People, places and organizations

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Questions & answers

Open discussion

Places

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Objects Flat on the Bottom and Domed

New Reports Also Caused Concern

What Remains Unknown

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