Astronomer and USAF consultant J. Allen Hynek and Captain Edward J. Ruppelt, the first head of Project Blue Book, revealed the existence of a suppressed top-secret intelligence estimate from Project Sign that had been ordered destroyed by Hoyt Vandenberg.

Authors

• Person: Not available Organization: Wikipedia
  Unidentified flying object - Wikipedia

Sources

• Unidentified flying object - Wikipedia en.wikipedia.org Wikipedia via serper

Referenced by nodes (7)

• Project Blue Book event
• Air Force entity
• J. Allen Hynek entity
• Project Blue Book concept
• Project Sign concept
• Project Sign event
• Hoyt S. Vandenberg entity