Like many engineers, he says he hasn't given the crash investigation intense thought.

And the maintenance record of the plane is also a key piece of evidence in any crash investigation.

A campaign to have the Gabonese crash investigation publicly released continued into the 2000s.

Two days into the crash investigation of Flight 800, people did not even know exactly where the plane was.

"We still need to look at everything in that area," said a metallurgist working on the crash investigation.

Rescue efforts are over and police begin the crash investigation.

Video would have proved invaluable in one recent crash investigation.

If any charges are filed, they would come at the end of the crash investigation, probably sometime next week, Bridges said.

Canadian authorities, who are conducting the crash investigation, have yet to say why it happened.

Flight testing continued some months later after the crash investigation was concluded.