Disclosure Index

839 FILES·LAST 2D AGO

839Files276Intl159Lore132Papers354NodesLast disclosureLast2D AGO

TP · TopicProgram

Project Grudge

The Air Force's 1949 Project Grudge report, the public successor to Project Sign and a key predecessor to Project Blue Book. Primary Grudge files, AARO historical references, and related early-Cold-War program records.

11

Files

7

Findings

3

Papers

1948-2024

Years

Primary documents · 11

PDFProject Grudge Final Report, August 1949U.S. Air Force Air Materiel Command
PDFLaPaz Green Fireball Case Yields Cobalt SpheresDepartment of War
PDFDEFE 44/119, Defence Scientific Advisory Council UFO PolicyUK Ministry of Defence / Defence Scientific Advisory Council
PDFProject Twinkle Final ReportUSAF / Cambridge Research Laboratories
PDFRobertson Panel Finds No UFO Threat, Urges DebunkingCIA
PDFCIA's Cold War UAP Analysis, 1947 to 1990Central Intelligence Agency
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)
PDFBlue Book's Stronger Reports Yielded More UnknownsCIA

Findings · 7

Scholarly research · 3

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
PAPERThe Prospect of Executive Branch UAP Secrecy: The Harm to Congress and Potential RemediesSkafish · 2024