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what was the Belgian UFO wave
What is From 1989 to mid-1991, around 3,500 UFO sightings were recorded in Belgium.[130] On the night of March 30, 1990, hundreds of people reported seeing UFOs in the airspace over Belgium, and unknown targets were confirmed by radar.[131] Two Belgian Air Force (BAF) F-16 fighters attempted to intercept the objects, with no success.[131] The radar tapes were later analyzed by the BAF, who concluded that the anomalies could have been caused by processing errors on the on-board computers.[131] Ufologist Renaud Leclet states that some of the sightings could be explained by helicopters with unusual designs, with which the public was unfamiliar.[132]