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.
Australia's Prime Minister says he is confident a series of pings is coming from Flight 370's black boxes. If they are in the area where searchers are looking, they could be nearly three miles below the ocean's surface. When and if the black boxes are recovered, there are serious questions about what sort of information will be on them. Randi Kaye takes a look at what investigators were able to learn from the black boxes salvaged in previous air disasters.
Authorities continue to narrow the Flight 370 search zone after picking up a series of pings. Tom Foreman takes a look at why it is so difficult to figure exactly where those signals are coming from.
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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