US Navy officer Mark Matthews (C) speaks to the media in Perth, Australia, on April 7, 2014. An Australian vessel searching the missing Malaysian flight 370 has detected electronic pulse signals probably related to the black box in the Indian Ocean during the past 24 hours. However, the unsuccessful effort to reacquire the signal later may suggest the battery may finish in a very short time, according to searching officials and US Navy technicians. [Photo/Xinhua] |
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