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When did Project Blue Book operate?
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unidentified flying object
Learn about an unidentified aerial phenomena (UAP) sighting from this video (known as the Gimbal video) captured by fighter pilots associated with the USS Theodore Roosevelt carrier strike group. The video shows instrument detections of unknown aerial objects, which the pilots were unable to identify, off the East Coast of the United States, 2014–15.
Project Blue Book operated from 1952 to 1969. It was the longest-running United States Air Force program dedicated to investigating reports of unidentified flying objects (UFOs).12
The program was officially launched in March 1952 as the successor to earlier, shorter-lived initiatives known as Project Sign and Project Grudge. Throughout its duration, the project recorded 12,618 sightings before it was formally terminated on December 17, 1969.12