Searching in one of the most difficult locations on earth

The Flight 370 search zone is deep, rough and hard to reach. This isn't the first time a massive search has been necessary in this region. It took decades to find a ship that sank during World War Two. Atika Shubert looks at the lessons that might help in the Flight 370 search.

Anderson discussed this with David Gallo who co-led the search for Air France Flight 447.