Description of video.
In this video, retired Belgian Air Force General Wilfried De Brouwer discusses a wave of triangular UFOs he investigated in 1989 and 1990. He was in charge of the Belgian Air Force's official investigation. They never came to a definite conclusion as to where the mysterious triangles came from. De Brouwer also discusses the controversial photograph that was allegedly taken in Petit-Rechain.
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Link to video https://www.youtube.com/watch?v=tdEALPvl_4Q.
Video from YouTube Channel Open Minds Production.