In 1989 and 1990, mass sightings of large, silent, low-flying black triangles occurred over Belgium, which were tracked by NATO radar and jet interceptors and investigated by the Belgian military with photographic evidence.

Authors

• Person: Not available Organization: Wikipedia
  Unidentified flying object - Wikipedia

Sources

• Unidentified flying object - Wikipedia en.wikipedia.org Wikipedia via serper

Referenced by nodes (2)

• Belgium location
• Nate entity