Governmental investigations

As a journalist and historian who has covered the White House and issues related to national intelligence, my guest, Garrett Graff, thinks that some of the conspiracies about the so-called deep state have their roots in conspiracy theories about UFOs. His new book, "UFO: The Inside Story Of The US Government's Search For Alien Life Here - And Out There "begins in the 1940s and is about the history of reported UFO sightings, how the government investigates those sightings, what the military knows and what it keeps secret and how UFO conspiracy theories start and spread.