Archive record · pdf

Project SIGN — Final Report (Air Materiel Command)

Source label

U.S. Air Force

Catalog date

1949-02-11

Record type

pdf

Record summary

The first U.S. Air Force UFO investigation program (predecessor to Grudge and Blue Book), based at Wright-Patterson AFB. Its February 1949 final report concluded the phenomenon was real but could be explained by misidentification, mass hysteria, or hoaxes — though a suppressed 'Estimate of the Situation' reportedly argued otherwise.

This is archive metadata, not a transcript. Catalog dates may refer to a release or collection rather than the event itself.