On July 24, 1952, at the start of the morning, several witnesses observed a big formation of "flying saucers" over the city of Arnhem, in the eastern Netherlands ...

It was 6:30 am when a mother and her four children (two girls aged 16 and 13 and two boys aged 12 and 10) saw several spherical UFOs moving in a "V" formation in the sky.. These unidentified craft came from the north and went south.

After a few minutes, they suddenly disappeared without leaving the slightest trace.

This mysterious case was the subject of a CIA report. The document was declassified on November 6, 1978.