Reported UFO sighting · Historical sighting · Godman Field, Fort Knox, Kentucky, USA
Mantell UFO incident
On 7 January 1948 Thomas Mantell died chasing an object 250 to 300 feet across.
The Air Force first blamed Venus, then a balloon. Why trust the second answer?
Photo: Mark S. Hilton, CC BY-SA 4.0, Wikimedia Commons