The search for Malaysia Airlines Flight 370 is now in its 40th day, and searchers have yet to turn up a piece of the plane.
Underwater search resumes for missing Malaysia Airlines plane
If the aircraft is found at the bottom of the Indian Ocean, investigators will have to figure out how to retrieve the black boxes and salvage the wreck from the sea floor.
CNN's Akiko Fujita takes us inside the challenging recovery operation.
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