Herken visited Fortenberry in the latter’s North Carolina home, and the two began to work together to find the cause of the Pan Am Flight 7 crash ... United’s Douglas DC-6s and TWA’s ...

Pan Am Flight 7 was a horrific aviation disaster that saw all 44 people on board perish and it's still unclear why the plane crashed into the ocean - but two men have been determined to find out ...

Newspaper accounts of the time speculated that the Clipper had been hit by a meteor, or even shot down by a flying saucer ...