We may not know if aliens exist, but UFOs still pose a national security risk

A highly anticipated report from U.S. intelligence released Friday focuses on unidentified aerial phenomenon or UAPS, commonly known as UFOs. The report from the Office of the Director of National Intelligence concludes that unidentified objects clearly pose a risk to flight and a national security threat to the U.S. But the larger question about alien life remains unanswered. John Yang reports.

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Видео We may not know if aliens exist, but UFOs still pose a national security risk канала PBS NewsHour