The hunt for AirAsia flight QZ8501 has begun for a third day, with the search area now expanding far beyond the plane's original flight path.
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Countries around the region as well as the US, France and Australia are joining the search over the Java sea.
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The Airbus A320-200, carrying 162 people, disappeared on Sunday shortly after leaving Surabaya in eastern Java on its way to Singapore.
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The pilot's last contact was a request to divert around bad weather.
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Indonesian officials say air traffic control approved one request, then gave clearance to a second request two to three minutes later for the plane to climb.
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No reply was received from the plane, which then disappeared from radar. No trace has been found despite a two-day search.