The events of 29 November 1989 were corroborated by no less than thirty different groups of witnesses and three separate groups of police officers. All witnesses described a large object flying at low altitude. The ship was flat, triangular in shape, with lights below.
This gigantic vessel made no sound as it moved slowly over the Belgian landscape. A free exchange of information was organized, as the Belgian population tracked the ship as it moved from Liege to the Dutch-German border.
This first startling sight turned into a wave of UFO sightings over the next few months. On two occasions, a pair of F-16 fighters pursued a mysterious object, but to no avail.
On March 30, 1990, the military headquarters received a desperate call from the captain of the Belgian National Police. He reported a giant triangle flying past him, and simultaneously two ground-based radar stations showed an object of unknown origin on their screens.
One of these bases was under NATO control near the city of Glons, located southeast of Brussels.
After contacting other radar installations, they learned that at least four other stations were also reporting the object on their screens. The object moved slowly across their screens, and was unable to send a transponder signal to identify itself.
Two F-16s were ordered to intercept and identify the phenomenon, and one of the aviation radars recorded the object. He appeared like a small diamond on the pilot's screen.
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The pilot reported that just a few seconds after target acquisition, the object began to gain speed, quickly moving out of the radar zone.
An hour-long chase followed, during which the F-16s intercepted the strange ship's signal two more times and saw it disappear from sight.
The triangular ship seemed to be playing cat and mouse and was finally lost in the night lights of Brussels.
The fighter pilots reported that the UFO was making maneuvers at speeds exceeding the capabilities of their technology - the radar showed a sharp drop in the unknown aircraft from 3 kilometers to 150 meters in 5 seconds!
Unusual aircraft continued to appear for several months, and the triangular UFO was seen over 1,000 times, both day and night. The object sank low enough to be easily seen with the naked eye, making it one of the most high-profile stories in Belgian media.
Another unusual phenomenon associated with the Belgian UFO was the inability to take a clear photo of it. Many observers kept their cameras ready and filmed what they thought should be a clear image, but when the film developed, the image was blurry, and the outlines of the ship were blurry at best.
This anomaly was considered by physics professor Auguste Meessen, who worked at the Catholic University of Louvain. Meessen's research gave the theory that infrared light must be the reason that almost all images were obscure. To test his theory, he exposed the film to infrared radiation and then photographed objects in normal light. The results were the same as in the photographs of the triangular UFO.
One good image was finally captured in April 1990. This image showed the underside of the ship's hull with spotlights at three corners.
