The data used in the 'Preliminary Assessment: Unidentified Aerial Phenomena' report is based on U.S. government reports of incidents that occurred from November 2004 to March 2021.

Authors

• Person: Not available Organization: HSDL
  Preliminary Assessment of Unidentified Aerial Phenomena Released

Sources

• Preliminary Assessment of Unidentified Aerial Phenomena Released www.hsdl.org HSDL via serper

Referenced by nodes (1)

• United States federal government entity