A Swedish UFO organisation that keeps an archive of cases and takes them seriously enough to argue. Its researcher Clas Svahn spent more than 100 hours interviewing Gösta Carlsson about the Ängelholm landing, concluding the encounter was not factual but sincerely believed. At Lergravsviken on Gotland, the group challenged the balloon theory and still lists the 1957 sighting among eleven unexplained cases in its archive. 3 June 1983. Together with UFO-Norge, it launched Project Hessdalen. The following winter a team watched the Norwegian valley with radar and cameras and logged 188 sighting reports.
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