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(CNN) – Even with a narrowed search area, the underwater search for Malaysia Airlines Flight 370's data recorders will not be a quick search. Searchers will be using an unmanned underwater vehicle, the Bluefin-21, which moves at a walking pace.
CNN aviation analyst and author of "Why Planes Crash" David Soucie discusses whether searchers waited too long to switch to the Bluefin-21, and more on the underwater search.