Five years since MH370 disappeared, work on for improved tracking | Al Jazeera English

It is the fifth anniversary of one of the greatest ever aviation mysteries as 239 people on board Malaysian Airlines' Kuala Lumpur-Beijing flight (MH370) vanished.
The disappearance spurred demands for improved tracking technology and American engineers hope a network of satellites in space could be the answer.
Al Jazeera's Heidi Zhou-Castro reports from Virginia.

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