Wreckage of the Asiana Airlines flight
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Asiana Airlines Boeing 777 crash lands in San Francisco

A Boeing 777 aircraft which took off from the South Korean capital, Seoul, has crash-landed at San Francisco international airport.

Pictures posted on Twitter showed passengers jumping down the inflatable emergency slides and leaving the area, as plumes of smoke rise from the plane.

Firefighters and rescue teams are at the scene of the downed Asiana Airlines Flight 214. The cause of the emergency is not known.

David Willis reports.

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