If Flight 370 is spotted in the depths of the Indian Ocean, high tech submarines will likely be sent in to retrieve it. David Mattingly is in Horseshoe Bay in British Columbia for a first-hand look at how a submarine's claw can pick up objects.
Anderson Cooper goes beyond the headlines to tell stories from many points of view, so you can make up your own mind about the news. Tune in weeknights at 8 and 10 ET on CNN.
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