SEOUL, South Korea—A man who opened an emergency exit door during a flight in South Korea was formally arrested Sunday and faces up to 10 years in prison on a charge of violating the aviation security law, officials said. During a preliminary questioning, the 33-year-old told investigators that he felt suffocated and tried to get…

SEOUL, South Korea—A man who opened an emergency exit door during a flight in South Korea was formally arrested Sunday and faces up to 10 years in prison on a charge of violating the aviation security law, officials said. During a preliminary questioning, the 33-year-old told investigators that he felt suffocated and tried to get…