The Decades-Long American UFO Saga, From Reality to Fiction

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From the first widely reported UFO sighting by pilot Kenneth Arnold in 1947 to the recent Pentagon studies and congressional hearings, the American public's fascination with unidentified flying objects has spanned nearly a century. This story traces the key events, investigations, and cultural touchstones that have shaped the ongoing UFO saga in the United States, including government projects, alleged sightings, and influential sci-fi films and TV shows.

Why it matters

The topic of UFOs and extraterrestrial life has captivated the American public's imagination for decades, sparking countless conspiracy theories, government investigations, and cultural depictions. While no definitive proof of alien visitation has emerged, the persistent reports of unidentified aerial phenomena continue to raise national security concerns and scientific questions about the nature of our universe.

The details

The modern American UFO saga began in 1947 when pilot Kenneth Arnold reported seeing nine unidentified objects near Mount Rainier in Washington state. This sparked a wave of other sightings, including the famous Roswell incident in New Mexico, where authorities initially claimed to have recovered a "flying disc" before backtracking and saying it was a weather balloon. In the decades that followed, the U.S. Air Force launched several investigations into UFOs, including Project Sign, Project Grudge, and Project Blue Book, which looked into over 12,600 reported sightings between 1948 and 1969. Meanwhile, UFO-themed films like "The Flying Saucer" and TV shows like "Star Trek" captivated the public's imagination. More recently, the Pentagon has acknowledged the existence of unexplained aerial phenomena captured on video by U.S. military personnel, leading to renewed government interest and congressional hearings on the topic.

• On June 24, 1947, private pilot Kenneth A. Arnold reports seeing nine objects flying near Mount Rainier in Washington state.
• On July 2, 1947, a ranch foreman checking on sheep finds strange debris spread over a prairie near Roswell, New Mexico.
• In 1948, the U.S. Air Force launches Project Sign, an investigation into UFOs, which is later renamed Project Blue Book in 1953.
• In September 1966, 'Star Trek' premieres on NBC, launching the most enduring space drama in history.
• In December 1969, the U.S. Air Force says it found no evidence of any UFO that was extraterrestrial in nature or that threatened national security, and terminates Project Blue Book.

What they’re saying

What’s next

The Pentagon's All-Domain Anomaly Resolution Office (AARO) will continue to track reports of unidentified objects in the sky, under water, and in space, while NASA has launched an independent study of UFOs as part of a new push toward high-risk, high-impact science.