The Fort Itaipu, Brazil sighting by two sentries occurred at about 2 am on 4 November 1957, with alleged injuries and electromagnetic effects.

This incident is Case 70 in Isaac Koi's "Top 100" article,  since it was referred to in 40 of the books covered by that article.

This incident featured in the results of a survey in 1965 by Jacques Vallee of the opinion of various UFO groups as to the most significant UFO sightings.

This was Project Blue Book Case Number 5119. 

 

 

 

On 5 November 1957, the US Department of Defense issued a news release stating that no evidence had been discovered to confirm the existence of so-called “Flying Saucers” and details methods of investigation (Press Release Number 1083-58).

 

 

 

The Kirtland AFB runway radar/visual incident occurred on 4 November 1957.

 

 

 

On 5 November 1957, Reinhold Schmidt, a grain buyer, claims to have spoken, in “high German”, to the crew of a UFO that had allegedly landed to make repairs near Kearney, Nebraska.

This incident is Case 76 in Isaac Koi's "Top 100" article,  since it was referred to in 38 of the books covered by that article.