Researcher Ronald Maidana, a specialist in UFOs (now called UAPs), said that most sightings have a rational explanation, but a small percentage remains unsolved. He also mentioned historical records in Paraguay, including a 1991 case involving a Líneas Aéreas Paraguayas plane.
The Black Vault
Sitio web que almacena miles de documentos oficiales desclasificados sobre OVNIs.