Case file · Government program
Project Grudge
The Air Force's short-lived 1949 successor to Project Sign, widely seen as built to debunk reports rather than study them.
1949 CE · 39.82, -84.05 · status: official
The account
Grudge took over from Sign in February 1949 and formally ended that December, after a report that put sightings down to misidentification, mass hysteria and hoaxes. It was quietly revived in late 1951 under Lt Edward Ruppelt and renamed Project Blue Book in March 1952.
The sceptical view
Defenders note that most reports really were misidentified aircraft, balloons and astronomical objects.
Connections in the atlas
- Edward J. Ruppelt
- Edward J. Ruppelt
- The Report on Unidentified Flying Objects
- ▶ The government UFO files
- Project Sign
- Project Blue Book begins
- J. Allen Hynek
- Project Blue Book closes