FILE 013 // PUBLIC RECORD
Project BLUE BOOK
The longest-running U.S. Air Force program created to collect, investigate and evaluate reports of unidentified flying objects.

DOCUMENTATION CONFIDENCE
ModerateOfficial records document the subject, but the available material contains unresolved questions, contested interpretations, incomplete data, or a limited number of primary sources.
CASE OVERVIEW
Project BLUE BOOK: What the public record documents
For seventeen years, the U.S. Air Force officially investigated thousands of reports of unidentified objects in the sky.
EXECUTIVE SUMMARY
The public record identifies Project BLUE BOOK as a aerial investigation matter associated with U.S. Air Force during 1952–1969. The longest-running U.S. Air Force program created to collect, investigate and evaluate reports of unidentified flying objects.
For seventeen years, the U.S. Air Force officially investigated thousands of reports of unidentified objects in the sky.
The longest-running U.S. Air Force program created to collect, investigate and evaluate reports of unidentified flying objects.
The linked source set contains 2 official or primary archival records. Together, these materials establish the responsible organizations, the relevant time period, the reported location, and the official findings or historical conclusions summarized in this file.
Where the underlying records contain allegations, witness statements, preliminary leads, or unresolved observations, this archive identifies them as claims or unresolved material rather than established fact. The appearance of a statement in a government file does not by itself prove that the statement is accurate.
KEY FINDINGS
Documented time period: 1952–1969.
Primary organizations or record holders: U.S. Air Force.
Principal location: Wright-Patterson Air Force Base, Ohio.
Archive topic: Aerial Investigation.
DOCUMENT ANALYSIS
National Archives — Project BLUE BOOK
Official archival or primary-source recordEstablishes archival provenance, release history, and the official record collection available to the public.
OPEN DOCUMENT ↗National Archives — Blue Book 50th anniversary
Official archival or primary-source recordEstablishes archival provenance, release history, and the official record collection available to the public.
OPEN DOCUMENT ↗SOURCE DOCUMENTS
National Archives — Project BLUE BOOKOfficial or primary archival source used to document this file.OPEN SOURCE ↗National Archives — Blue Book 50th anniversaryOfficial or primary archival source used to document this file.OPEN SOURCE ↗