By NBC News
September 8, 2014

Not since the American aviation pioneer Amelia Earhart disappeared without a trace over the Pacific 77 years ago has there been a mystery like it.

And in so many respects the disappearance of Malaysia Airlines Flight 370 exactly six months ago today is a far more profound puzzle.

When Earhart went missing her plane was equipped with radio navigation systems, a Morse code receiver and a voice transmission system, all of which she used until her plane vanished into the sea. But this is rudimentary equipment compared to the highly sophisticated location devices on board the modern Malaysia Airlines jet…

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