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CBS News has obtained video never seen publicly before that shows the chaotic scene of the Asiana Airlines crash landing in San Francisco last summer, where a 16-year-old who survived was later killed by a fire truck.
The video is important because it may answer a key question: How was Ye Meng Yuan later run over by the truck?
Video from a camera mounted on a firefighter's helmet was provided to CBS News by a source close to the family of Ye Meng Yuan. Other video comes from the fire truck.