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April 17th, 2014
08:50 PM ET

Deep water search for Flight 370 could lead to manned expedition

Even if investigators are able to locate the wreckage of Malaysia Airlines Flight 370 on the ocean floor, bring it to the surface will be a huge challenge.

MH370: Undersea search could cost a quarter billion dollars, official says

It could involve a manned expedition, three miles below the surface of the ocean.

CNN's David Mattingly is inside a manned submersible in Horseshoe Bay in Vancouver to show us what it's like.

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