The hearing by the House Transportation Committee comes amid worldwide outrage sparked when a passenger was dragged off a United flight after refusing to give up his seat to a crew member.

"The treatment of the passenger in last week's incident at O’Hare is inexcusable and must be stopped."

David Dao, a 69-year-old Vietnamese-American doctor, was hospitalized after Chicago aviation police dragged him from the plane as the airline sought to make space on a flight from the city's O'Hare International Airport to Louisville, Kentucky.