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Operators aboard the Australian ship Ocean Shield move the U.S. Navy's Bluefin-21 autonomous underwater vehicle into position for deployment in the Indian Ocean on Monday, April 14.
Operators aboard the Australian ship Ocean Shield move the U.S. Navy's Bluefin-21 autonomous underwater vehicle into position for deployment in the Indian Ocean on Monday, April 14.

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    Underwater robot 0 for 4

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Underwater robot 0 for 4

Bluefin-21 has made four dives, but found no wreckage of Flight 370. CNN's Pamela Brown reports.

Underwater robot 0 for 4

Bluefin-21 has made four dives, but found no wreckage of Flight 370. CNN's Pamela Brown reports.