The authorities in Nigeria said that the United Airlines plane had to return to Lagos, Nigeria, after the episode. Six people were treated at a hospital, officials said. Airlines and Airplanes, Aviation Accidents, Safety and Disasters, United Airlines, Boeing Company, Lagos (Nigeria), Nigeria, Washington (DC) The authorities in Nigeria said that the United Airlines plane had to return to Lagos, Nigeria, after the episode. Six people were treated at a hospital, officials said. NYT > Business