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A cockpit voice recorder, the second black box of Lion Air flight 610, is checked by Indonesian personnel in Karawang, West Java province of Indonesia, Jan. 14, 2019. (Xinhua/Zulkarnain)

A cockpit voice recorder, the second black box of Lion Air flight 610, is checked by Indonesian personnel in Karawang, West Java province of Indonesia, Jan. 14, 2019. (Xinhua/Zulkarnain)