Two security officers involved in an incident in which a passenger was dragged off a United Airlines flight after refusing to give up his seat have been fired, the Chicago Department of Aviation has said.

Two security officers involved in an incident in which a passenger was dragged off a United Airlines flight after refusing to give up his seat have been fired.

A deadly winter storm that caked America’s centre with a thick layer of ice claimed at least 17 lives and blacked out more than 600,000 homes and businesses.