American Nathan Chen won his first men's world figure skating championship on Saturday, with a stunning free skate to leave Japan's Shoma Uno to finish second for two years running.Chen, who won Thursday's short program, skated to a career-best 219.46 points in his free skate for a career-high 321.40 to achieve some redemption after a disappointing fifth place at last month's Pyeongchang Olympics. The 18-year-old attempted six quads in his program and was only marked down on two of his jumps.Russia's Mikhail Kolyada, who was second in the free program, was fourth in the free skate to finish…READ FULL ARTICLE