Could underwater volcanoes hamper the search for Malaysia Airlines Flight 370?
So many sightings, nothing to see - search for Flight 370 objects still wanting
CNN's Chad Myers says even if debris can be found at the surface, the ocean floor beneath the search is extremely unpredictable, with shifting currents and even a chain of underwater volcanoes.
Myers takes a closer look at the rough terrain that may complicate the search for the missing plane.
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