GovernmentWright-Patterson AFB, OH

Project Blue Book Special Report No. 14

First page of the Project Blue Book report No. 14
The first page of Project Blue Book report No. 14, dated May 5, 1955 US Air Force, Public domain, via Wikimedia Commons

Blue Book Special Report No. 14, a statistical analysis of about 3,200 reports through 1952 carried out with Battelle Memorial Institute, judged it highly improbable that the unidentified cases reflected technology beyond known science. The Air Force made it public in October 1955.

Evidence
Significance

Sources

  1. OfficialProject Blue Book Special Report No. 14 (Analysis of Reports of Unidentified Aerial Objects), CIA-RDP81R00560R000100060001-5CIA FOIA Electronic Reading Room / 1955-05-05
  2. OtherProject Blue Book Special Report #14 - May 5, 1955The Black Vault

How sources are chosen and tiered