Project Sign: Compilation of Unidentified Flying Object Incident Reports

This document is a comprehensive compilation of incident reports and sworn affidavits regarding Unidentified Flying Objects (UFOs) collected under the auspices of Project Sign. The reports span various locations, primarily within the United States and Canada, during the summer and autumn of 1947 and early 1948. The incidents involve military personnel, police officers, and civilian pilots. Common descriptions of the objects include silver, disc-like, or spherical shapes, often exhibiting high speeds, unconventional flight maneuvers such as tight circles or oscillating movements, and a lack of visible propulsion systems or engine noise. Several reports mention the objects reflecting sunlight, suggesting a metallic construction. Notable incidents include the sighting by Kenneth Arnold near Mt. Rainier, which is documented in detail, and various sightings in the Portland, Oregon area, and Newfoundland. The document also includes internal military correspondence regarding the investigation of these sightings, including requests for information and the evaluation of photographic evidence. The tone of the reports is formal and investigative, with military personnel and intelligence officers attempting to verify the credibility of witnesses and the nature of the phenomena. Some reports are later identified as hoaxes or attributed to natural phenomena like meteors, while others remain categorized as unidentified.