DOW-UAP-D100, Air Materiel Command Report on Unidentified Flying Objects, 1947-1948

DOW-UAP-D100, Air Materiel Command Report on Unidentified Flying Objects, 1947-1948 is a declassified Archival Record from Department of War. The record is dated 1947, was released in Release 05 on 2026-08-07 under the PURSUE initiative, and contains 1 file.

This file is a collection of U.S. Government memoranda and correspondence relating to "Project Sign," a 1948 U.S. Air Force program to investigate reports of high-performance airborne objects. The documents characterize some of these reports as being consistent with "real" objects rather than fabrications or resulting from perceptual errors. The U.S. Air Force cites the reported characteristics of the phenomena, e.g., high speed and maneuverability, as exceeding known performance envelopes of U.S.