Project Sign was the U.S. Air Force's first official study of unidentified aerial objects, beginning in 1948.
Project Sign was a U.S. Air Force program established to examine reports of unidentified aerial objects. It operated out of Wright-Patterson Air Force Base in Ohio, and its archives contain reports and summaries of incidents from the late 1940s.
Sign is considered part of the early post-World War II investigations by the U.S. Air Force, later followed by Project Grudge and Project Blue Book. According to later historical accounts, an early intelligence assessment considered whether some sightings might have an extraterrestrial explanation; this idea was not adopted as official Air Force policy.
According to the U.S. Air Force's current public stance, historical projects like Sign were intended to evaluate reports and determine if they raised concerns for national security or aviation safety. Claims appearing online that are not supported by government records should be treated as historical speculation.
It was a U.S. Air Force program for examining reports of unidentified aerial objects, which began in 1948.
No. According to later historical accounts, an intelligence assessment considered such a possibility for some sightings, but the Air Force did not adopt it as official policy.
The project operated out of Wright-Patterson Air Force Base in Ohio.
It was later followed by Project Grudge and Project Blue Book, as part of the U.S. Air Force's investigation into reports of unidentified objects.