RB-47 Reconnaissance Aircraft Tracked by Unidentified Object for 90 Minutes

A U.S. Air Force RB-47H electronic reconnaissance aircraft with a crew of six was tracked by an unidentified object across four states over a period of approximately ninety minutes. The crew visually observed an intensely luminous object while their electronic countermeasures equipment simultaneously detected a strong electromagnetic signal from its direction. Ground radar stations independently confirmed an unknown return in the same position. The object reportedly hovered, paced the aircraft at varying distances, and executed abrupt speed changes before disappearing. Atmospheric physicist James McDonald later called it one of the most scientifically significant radar-visual cases on record.