🇺🇸 USAF — Project Blue Book
A civilian observer in Green City, Missouri, spotted an unidentified object in February 1955. The object, described as a disc about 100 feet in diameter and 12 feet thick, was hovering at an estimated altitude of 500 feet. The witness, driving a vehicle at the time, estimated being one mile away from the object. The sighting lasted between 20 and 25 seconds, limiting the possibility of gathering more information. Due to the brief duration of the event and the delay in receiving the initial report, authorities did not conduct a follow-up investigation.