Black UFO over Byrdstown, Tennessee

Summary

An observer reported a black object with blurry edges appearing over a mountain near Byrdstown, Tennessee, in April 1967. The event lasted about 10 seconds and emitted a humming sound. The object was described as solid but with indistinct contours and disappeared suddenly over the horizon. Despite the detailed description, no physical evidence was found and the object was not identified with known elements. The Air Force requested further information via a questionnaire for research, but the case had no conclusive resolution.