Mantell UFO Incident — National Guard Pilot Dies Pursuing Object Over Kentucky

On January 7, 1948, Kentucky State Police received dozens of calls from citizens who observed a large, bright, circular object moving slowly through the sky over Maysville. The reports were forwarded to Godman Army Airfield near Fort Knox, whose tower personnel confirmed a visual sighting of an unusual object. Four P-51 Mustang fighters of the Kentucky Air National Guard were vectored toward the object. Captain Thomas Mantell radioed that the craft was enormous, metallic and tremendous in size, and that he was continuing to climb toward it. He was the only pilot to continue the pursuit above 15,000 feet without oxygen equipment. Mantell's aircraft was later found crashed and disintegrated near Franklin, Kentucky. He had apparently lost consciousness from hypoxia at high altitude, but his death made the Mantell incident the first widely publicized case involving a fatality linked to a UFO pursuit. The Air Force's original explanation was that Mantell had been chasing Venus. This was widely ridiculed given the daylight visibility and Mantell's description of the object. Project Blue Book later suggested he had been chasing a Skyhook balloon, a program classified at the time. The discrepancy between early official explanations and physical reality left the case controversial for decades.