A Trendex survey conducted in August 1957 reported that over 25% of the U.S. population had heard of or were aware of UFOs ten years after the Kenneth Arnold incident.

Authors

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

Sources

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

Referenced by nodes (2)

• U.S. location
• Kenneth Arnold UFO sighting 1947 event