United Airlines boss 'ashamed' over passenger's removal

United Airlines CEO Oscar Munoz says he felt "ashamed" watching video of a passenger being dragged off a flight and has promised to review the airline's passenger removal policy.

In an interview with ABC's Good Morning America, Mr Munoz apologised to Dr David Dao of Elizabethtown, Kentucky, his family and the other passengers who witnessed him being forcibly removed from the United Express plane.