Released on Tuesday, James Fox’s new documentary The Phenomenon, offers a historical inquiry into UFOs. Or what the U.S. Military refers to as “Unidentified Aerial Phenomena.”

Long seen as a preserve of conspiracy theorists and occultists, UFOs have attracted new interest in recent years. In large part because of the New York Times‘ 2017 publication of videos showing 2004 and 2015 U.S. Navy UFO intercepts off the U.S. East and West Coasts. The Navy doesn’t know what the objects in those videos are, but assesses with high confidence that they are not of United States, Chinese, or Russian government control. Referencing those incidents, The Phenomenon breaks news by getting a former Pentagon intelligence official, Christopher Mellon, on the record as the New York Times’ source.