The Pentagon UFO office just released its investigation of UFO sightings going back to the 1940s. We talk with maybe the most serious historian to study UFOs, Garrett Graff, to learn what UFO questions the Pentagon investigation has laid to rest, what new questions have been raised, why it’s sometimes in the interest of national security to keep information secret, and the connection Graff sees between UFO conspiracy theories and the attack on the U.S. Capitol on Jan. 6, 2021.

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