SEOUL, SOUTH KOREA — A passenger plane burst into flames Sunday after it skidded off a runway at a South Korean airport and slammed into a concrete fence when its front landing gear apparently failed to deploy, killing at least 85 people, officials said, in one of the country’s worst aviation disasters. The National Fire Agency said rescuers raced to pull people from the Jeju Air passenger plane carrying 181 people at the airport in the town of Muan, about 290 kilometers south of Seoul. The Transport Ministry identified the plane as a 15-year-old Boeing 737-800 jet and said the
