🇺🇸 USAF — Project Blue Book
In December 1957, in Porto Alegre, Brazil, a UFO sighting was reported by military personnel. A Major R. observed an object that did not appear to be a known planet, but instead had an unusual shape resembling two stacked bells. The object was seen by several officers and soldiers, who noticed it splitting into two parts. One part moved toward the south, while the other remained still before following the same path. A journalist was present during the final observation but the military refused to comment afterward.
The official report, though incomplete, suggests the phenomenon was real and witnessed by multiple people. However, no clear conclusion was reached about the object's nature. Considered explanations included balloons, aircraft, or astronomical phenomena, but none were accepted. The case remains one of many in UFO history without a definitive resolution.