The first day of the underwater sonar search for Flight 370 came to an early and abrupt end today. The Bluefin-21 unmanned submarine reached an area of the ocean that was deeper than expected. It was forced to return to the surface about ten hours early. Anderson spoke with Captain Mark Matthews who is heading the U.S. Navy's Bluefin operations and he described the search as tactical rather than strategic.
Randi Kaye got an exclusive up close look at the Bluefin-21
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