A Brief History On December 17, 1969, the U.S. Air Force shut down Project Blue Book, its investigation of UFOs. Digging Deeper Digging deeper, we find the late 1940s spawning a spate of UFO sightings. The U.S. Air Force conducted Project Sign in 1947 to study these reports, and Project Grudge in 1948. In 1952, Project Blue Book became the exhaustive investigation we know of today, the brainchild of Air Force generals who demanded a more thorough approach. Lasting until 1969 (mere months after the first moon landing), Project Blue Book had investigated over 12,000 reported incidents! The final report…
Browsing: December 17
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