United eyewitness: 'It got violent quickly'
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United Airlines eyewitness describes moment man was dragged off a plane

Shares in United Airlines' parent company have dropped after footage of a screaming passenger being dragged off an overbooked plane went viral.

Its CEO defended employees' conduct and said the passenger had been "disruptive and belligerent".

Eyewitness John Klaassen was on the plane and described what he saw.

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