Las Vegas Sun

September 2, 2014

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In this April 1, 2014, file photo, provided by the U.S. Navy, the Bluefin 21 autonomous sub is hoisted back on board the Australian Defense Vessel Ocean Shield after successful buoyancy testing in the Indian Ocean, as search efforts continued for missing Malaysia Airlines Flight 370.

U.S. Navy, Specialist 1st Class Peter D. Blair / AP

In this April 1, 2014, file photo, provided by the U.S. Navy, the Bluefin 21 autonomous sub is hoisted back on board the Australian Defense Vessel Ocean Shield after successful buoyancy testing in the Indian Ocean, as search efforts continued for missing Malaysia Airlines Flight 370.