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According to the releasing agency, this file is a collection of U.S. Government memoranda and correspondence concerning 'Project Sign,' a 1948 U.S. Air Force p…

This 67-page document is a USAF Air Intelligence Division analysis, 'Analysis of Flying Object Incidents in the United States,' Study No. 203, dated 10 Decembe…

According to the U.S. Department of War release, this file contains memorandums, correspondence, and forms related to the reporting of information on flying di…

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According to the releasing agency, this file is an initial progress report produced by the Air Materiel Command concerning Project Sign, a 1948–1949 U.S. Air F…

This 214-page PDF is Section 4 of the FBI's central-records UFO case file 62-HQ-83894 (serials 131–185), part of a larger file the releasing agency describes a…

According to the releasing agency (U.S. Department of War), this file primarily contains incident reports on Unidentified Flying Objects written in compliance…