Search teams for the missing Malaysian airlines flight are confident they've traced the plane's black box, and a ping sound has been detected.
The search operation is seeking to determine the black box's exact resting place in the southern Indian Ocean before the device's beacons fade.
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It's five weeks since flight MH370 went missing.
Today's operation covered an area over 15,000 square miles around 1,450 miles northwest of Perth in Australia.
