Disclosure Index

839 FILES·LAST 2D AGO

839Files276Intl159Lore132Papers354NodesLast disclosureLast2D AGO

TP · TopicProgram

Project Sign

1948 U.S. Air Force project to evaluate UFO reports, the first formal investigative program, replaced within a year by Project Grudge and ultimately Project Blue Book. Primary Project Sign records and the Estimate of the Situation references.

17

Files

10

Findings

4

Papers

1

Lore

1947-2024

Years

Primary documents · 17

PDFProject Sign Final Report, February 1949U.S. Army Air Forces / U.S. Air Force Air Materiel Command
PDFProject Sign Opens With 100 Sightings, 1948Department of War
PDFProject Sign Final Report (Technical Intelligence Report No. F-TR-2274-IA), Project Sign Microfilm Reels (archive.org)U.S. Army Air Forces / U.S. Air Force Air Materiel Command
PDFProject SIGN’s 180-Case ProblemDepartment of War
PDFAir Materiel Command's Disc Files, 1946-47Department of War
PDFDepartment of War Disc Intake, 1948Department of War
PDFDoW UFO Incident Summaries, Cases 101-172Department of War
PDFDEFE 44/119, Defence Scientific Advisory Council UFO PolicyUK Ministry of Defence / Defence Scientific Advisory Council
PDFProject Grudge Final Report, August 1949U.S. Air Force Air Materiel Command
PDFThe Condon Report (DTIC AD0680975)University of Colorado / U.S. Air Force (sponsor)
PDFAARO Historical Record Report, Volume I, 2024DoD / All-domain Anomaly Resolution Office (AARO)
PDFAARO HRR Vol I, Wikimedia MirrorDoD / All-domain Anomaly Resolution Office (AARO)
PDFAARO HRR Vol I, Pentagon Canonical PDFDoD / All-domain Anomaly Resolution Office (AARO)
PDFProject Condign, Unidentified Aerial Phenomena in the UK Air Defence Region, Volume 1 (Executive Summary, Chapters 1–5, Annexes A–F) (part 1)UK Ministry of Defence / Defence Intelligence Staff (DI55)
PDFGAO Report to the Honorable Steven H. Schiff, Government Records: Results of a Search for Records Concerning the 1947 Crash Near Roswell, New Mexico (NSIAD-95-187)U.S. General Accounting Office
PDFCIA's Cold War UAP Analysis, 1947 to 1990Central Intelligence Agency
PDFBlue Book's Stronger Reports Yielded More UnknownsCIA

Findings · 10

Scholarly research · 4

PAPERThe New Science of Unidentified Aerospace-Undersea Phenomena (UAP)Knuth et al. · 2025
PAPERAn environmental analysis of public UAP sightings and sky view potentialMedina et al. · 2023
PAPERUnidentified Anomalous Phenomena: Policy Implications for the Government of the United KingdomMcCaw · 2024
PAPERThe Prospect of Executive Branch UAP Secrecy: The Harm to Congress and Potential RemediesSkafish · 2024

Lore encounters · 1

United StatesChiles-Whitted Encounter