What is a black box, what can it tell us, and have the data recorders been found from Flight 5342 and the Army's Blackhawk?
Some have suggested that it stems from Hussenot's device, because it used film and "ran continuously in a light-tight box, ...
Some have suggested that it stems from Hussenot's device, because it used film and "ran continuously in a light-tight box, ...
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