The Cash-Landrum UFO incident occurred on December 29, 1980, near Dayton, Texas, involving Betty Cash, Vickie Landrum, and Vickie's grandson, Colby Landrum. They reported seeing a large, diamond-shaped object emitting intense heat and light, which was accompanied by military helicopters. The encounter left them with symptoms of radiation poisoning, including skin burns and nausea. Despite their claims, investigations yielded no official explanation, and the case remains one of the most notable UFO sightings in U.S. history. The incident has been the subject of ongoing debate and interest among UFO enthusiasts and researchers.

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