UFO sighted over Minneapolis in 1957

Summary

In January 1957, a witness in Minneapolis described a round object emitting solid green light with intermittent red flashes. He observed it for more than an hour and a half, watching it move between 20,000 and 30,000 feet. Although he initially thought it was an airplane, the object's behavior made him doubt. Investigators concluded it was likely a balloon, though no definitive confirmation was given. The object moved northeast and then east over Lake Superior.

The description and trajectory of the object generated interest, but there were no radar records or photographs. The observer used binoculars to track it for a long time. Despite clear skies and favorable conditions, no further clues about its identity were found. The report suggests it could have been a balloon, but also mentions the possibility of something more unusual. In any case, this case remains one of the mysterious files from the 1950s.