>>1 　海外メディア　ソース追加

BBC
「United Airlines incident: What went wrong?」
http://www.bbc.com/news/world-us-canada-39556910

CNN
「Passenger dragged off overbooked United flight」
http://edition.cnn.com/2017/04/10/travel/passenger-removed-united-flight-trnd/

NYタイムズ
「United Passenger Dragged From Overbooked Flight」
https://www.nytimes.com/2017/04/10/business/united-flight-passenger-dragged.html?_r=0