UFO seen as aircraft near St Louis in 1958

Summary

A 15-year-old in St Louis, Missouri, observed a white, oval object the size of a dime on August 7, 1958. The object had a faint trail and sounded like a jet aircraft. It moved in a straight line toward the northwest and disappeared from view in 40 seconds. The report notes that the sky was cloudy with thunderstorms, and the witness mentioned hearing the characteristic sound of an aircraft. Although initially considered the possibility of a balloon or astronomical phenomenon, investigators concluded it was likely an aircraft. The location of the sighting, near a military installation, adds an intriguing element to this case.