From Roswell to DoD/UAP: The Arc of UFO Secrecy and Public Belief Since 1947
To the point
Post‑1947 UFO sightings rose with the space age and while most explanations exist, about 10% remain unexplained, fueling claims of government secrecy around Roswell, Project Sign and Blue Book, MJ12 tied to Harry S. Truman, Area 51 and U‑2 rumors, with public opinion fluctuating and a 2021 DoD/UAP report leaving the extraterrestrial question unresolved.