Malaysia Airlines

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This image provided by the Joint Agency Coordination Centre on Wednesday, April 9, 2014, shows a map indicating the locations of signals detected by vessels looking for signs of the missing Malaysia Airlines Flight 370 in the southern Indian Ocean. An Australian official overseeing the search for the missing Malaysia Airlines plane said underwater sounds picked up by equipment on an Australian navy ship are consistent with transmissions from black box recorders on a plane. (AP Photo/Joint Agency Coordination Centre) EDITORIAL USE ONLY

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This image provided by the Joint Agency Coordination Centre on Wednesday, April 9, 2014, shows a map indicating the locations of signals detected by vessels looking for signs of the missing Malaysia Airlines Flight 370 in the southern Indian Ocean. An Australian official overseeing the search for the missing Malaysia Airlines plane said underwater sounds picked up by equipment on an Australian navy ship are consistent with transmissions from black box recorders on a plane. (AP Photo/Joint Agency Coordination Centre) EDITORIAL USE ONLY

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Malaysians gather during a candlelight vigil for passengers onboard the missing Malaysia Airlines Flight MH370, in Kuala Lumpur, Malaysia, Monday, April 7, 2014. An Australian ship detected two distinct, long-lasting sounds underwater that are consistent with the pings from aircraft black boxes in a major break in the month long hunt for the missing Malaysia Airlines jet, the search coordinator said Monday. (AP Photo/Vincent Thian)