J.A. Hynek analysis of K Arnold Sighting- "Final Report - Preview of Motion Picture "Unidentified Flying Objects"

From the Office of the Scientific Advisor, J.A. Hynek wrote an analysis of K. Arnold UFO sighting in 1947. Hynek was an American astronomer, professor, and ufologist. He is best known for his participation in three projects by the U.S. Air Force; Project Sign, Project Grudge, and Project Blue Book. He was among the first to conduct scientific analysis of reports and of trace evidence purportedly left by UFOs