The case record
What was reported?
Capt. Thomas Mantell pursued an unidentified object and was killed when his P-51 crashed.
- Reported date
- 7 Jan 1948
- Witnesses
- Military pilots / ground observers · Multiple
- Investigation
- USAF / Project Sign
Evidence in the record
Eyewitness; military records
Competing explanations
Official and research context
Later attributed to a high-altitude balloon
Conventional explanations
Skyhook balloon plus hypoxia/disorientation
Arguments that remain contested
Some timing and identification details remain debated
Locations & timeline
Coordinates are representative. Area and route labels do not imply exact paths or object positions.
- Primary reference location
Godman Army Airfield / pursuit area
Fort Knox
Reported event location · Approximate area radius: 5 km
37.907°, -85.972° · route · High
Record notes
Primary marker at Godman; route can be added later.
Imported starting record; individual claims and source links await editorial verification.
Original dataset status: Probably explained