UFCB Index Card and Incident Report — Elkhorn, Wisconsin, May 1957

On May 25, 1957, at approximately 0330Z, a sighting of three circular objects was reported five miles north of Elkhorn, Wisconsin. The witnesses, a civilian couple, observed the objects from their automobile. They initially perceived a white light, which they mistook for a flare, but later observed the objects as three red and white circular lights. The duration of the observation was approximately two minutes. The witnesses reported that the sound produced by the objects was dimmer than the normal noise of an aircraft. The objects were described as having a white light from the northwest and red lights from the south, which eventually separated. The official report from the 755th ACWRON, signed by Captain Henry D. Castille, concluded that the sighting was caused by aircraft. This conclusion was supported by a handwritten note on the document, which posited that the visual characteristics—specifically the separation of lights and the appearance of the objects—could be explained by aircraft flying in a steep bank or tight formation at night, such as F-86 aircraft. The report explicitly states that there was no air traffic in the area at the time of the observation, yet the final assessment remained that the phenomenon was aircraft-related.