Government
Project Sign
Air Force UFO project, 1948 (Wright Field).
Tied from
| From | Role | Years | Verdict | Source |
|---|---|---|---|---|
| Project Sign, Grudge and Blue Book were run from Air Materiel Command at Wright-Patterson, with Blue Book under ATIC | named | Structural | ||
| Kenneth Arnold sighting (1947) | the Arnold wave → Twining memo (Sept 1947) → Sign (end of 1947) | 1947 | Documented · occurred | en.wikipedia.org |
| Majestic 12 documents (1984-1996) | the real 1947 program the fakes imitate (Twining, Vandenberg, Hillenkoetter as 'members') | 1947 | Concept | |
| Project Blue Book | predecessor | 1948 | Documented · occurred | en.wikipedia.org |