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The Office of the Director of National Intelligence's June 2021 report to Congress reviewed 144 UAP cases, finding most unexplained and one attributable to a deflating balloon.
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AARO's first historical record report reviewed U.S. government UAP-related investigations back to 1945, finding no evidence of extraterrestrial visitation, crash retrievals, or reverse-engineering programs.
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NASA's independent study team released a 2023 report recommending better data collection for UAP research and finding no evidence UAP have extraterrestrial origin, while criticizing the stigma around reporting.