An example of what not to do

Video of an Asian passenger being dragged off a United Airlines flight by airport police in Chicago on Sunday night, which went viral on the internet, has drawn widespread public anger.

The apparent overuse of force by law enforcement personnel was disturbing, as the 69-year-old man, David Dao, can be seen to be bloodied and obviously dazed.

Dao posed no security threat at all to other passengers. But he was forcibly removed from the overbooked plane after he refused to relinquish his seat when asked to do so, with justifiable reason: As a doctor, he needed to get home to treat patients.