🇺🇸 USAF — Project Blue Book
In April 1964, two observers in Montana reported seeing an unidentified object shaped like an egg and white in color. The object was observed twice on consecutive days between April 19 and 25. The witnesses described it as something that "went up and down," but provided no further details on size, speed, or trajectory. Due to the lack of information, authorities requested additional data, which was never received. The report concluded the object could be a balloon, aircraft, or astronomical phenomenon, but no definitive conclusion was reached.
The observers, employees of a ranch in Custer County, reported the sighting after hearing a radio broadcast about a similar case. The local sheriff and an FBI agent passed the information to military authorities, but no weather conditions or further details were recorded. Eventually, the data was deemed insufficient for further evaluation.