April 11th, 2014
09:38 PM ET

Searching below the surface

The Flight 370 search zone is now about 16,000 square miles. That section of the Indian Ocean can reach depths close to three miles. Anderson takes a look at some of the high tech tools that are being used to find the source of those pings.

Gary Tuchman reports on why we may never know about some of the assets the U.S. Military is using to search for Flight 370.

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Filed under: Gary Tuchman • Malaysia Airlines Flight 370
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