A Timeline of the U.F.O.s That Were Shot Down - The New York Times

UFO Sighting Photos: 10 Unexplained Pictures From History

UFOs and the National Security State: Chronology of a Coverup

How UFO Sightings and Alien Autopsies Became Serious News

Jeffrey Kripal on how to think about the UFO phenomenon

NASA Learns the Ugly Truth About UFOs - The Atlantic

4 flying objects have been shot down over North America: Timeline

UFO Sightings Pose Danger to Aviation

Canada attends first-of-its-kind UFO briefing at the Pentagon

Inside the hunt for UFOs at the end of the world - The Japan Times