The West Rindge Incident (1947): Unsolved Fires from Cast-Iron Fragments Linked to a Hollow Cylindrical Object
To the point
In 1947, rural New Hampshire resident Charles Tasker saw hot metal fragments and circular ground burns that pointed to a hollow cylindrical piece that exploded, triggering FBI and MIT tests and many theories from wreckage to rockets or alien origins, but no conclusive answer has ever emerged.