Army Air Force Files - Twining Memo, USAFE TOP SECRET, and Project SIGN
Operationally significant documents from USAAF (1944-1948) and USAF (1949-1967) archives. Includes the September 1947 Twining Memo in which General Nathan Twining declares "the phenomenon reported is something real and not visionary or fictitious," the USAFE TOP SECRET cable from November 1948 in which an American officer reports "Swedes conclude that source of objects is non-terrestrial," and early Project SIGN material — among the strongest evidence in the archive (significance 9.6-9.8). PURSUE Release 4 added the foundational documents of official UFO study: the 1948 Project Sign progress report; the Top Secret joint USAF/ONI Intelligence Study No. 203 (1948 draft and 1949 edition), which concluded that "it appears that some object has been seen" but could not be identified; the O'Brien Committee file reviewing Project Blue Book (1966-1967), which includes a sanitized copy of the 1953 Robertson Panel report; the 1955 Blue Book correspondence file; and the joint U.S.-Canadian aviation-projects file with the KC-97 Newfoundland radar-visual incident. PURSUE Release 5 added the Air Materiel Command and Project Sign file, containing Maj. Gen. Charles P. Cabell's letter of 3 November 1948 -- "The conclusion appears inescapable that some type of flying object has been observed" -- alongside the Command's reply based on a study of some 180 incidents. It also added the War Department's January 1947 intelligence review of the "Ghost Rockets" over Scandinavia.
DOW-UAP-D099: The "Ghost Rockets" over Scandinavia - The War Department Intelligence Review, January 1947
Flying Discs 1947: The Secret Intelligence Files of Air Materiel Command
DOW-UAP-D087: U.S. Air Force Analysis of Flying Objects in the United States — Incident Summaries 1–100
Analysis of Flying Object Incidents in the U.S.: The Original December 1948 Draft of Intelligence Study No. 203
DOW-UAP-D097: The First Project Sign Progress Report - The First Hundred Sightings, 1948
DOW-UAP-D100: "The Conclusion Appears Inescapable" - The Air Materiel Command and Project Sign File, 1947-1948
Army Air Forces General File, 1948: The Institutional Foundation of Project SIGN and the Flying Disc Investigation
U.S. Air Force Intelligence Records: Top-Secret Flying Saucer Reports, November 1948
File 319.1 "Flying Discs" 1949: The U.S. Air Force Operational Reporting Network
DOW-UAP-D088: U.S. Air Force Analysis of Flying Objects in the United States — Incident Summaries 101–172
Analysis of Flying Object Incidents in the U.S.: The April 1949 Revision of Air Intelligence Study No. 203
DOW-UAP-D084: U.S. Army Evaluation Study of the Flying Saucer Phenomenon, 1949
DOW-UAP-D105: The Air Force Director of Intelligence "Flying Discs" File, September-December 1952 - Tremonton, Flatwoods and the DesVergers Cap
DOW-UAP-D102: The Project Blue Book File on the Tremonton Film, from "Unknown" to "Seagulls", 1952-1956
