Karen Shiffrin wins gold in the ladies slalom at the Alpine World Ski Championships . They all benefited from a lapse by overall World Cup points leader Marcel Hirscher of Austria , who was fastest on the first leg , but skied off the course second time down when looking set to win his second gold in Colorado . U.S. teenager and first American to successfully defend a slalom world title in 10 years . Second U.S. gold after Ted Ligety in giant slalom . NEW : Jean - Baptiste Roy wins concluding men 's slalom at Calgary .
Karen Shiffrin wins gold in the ladies slalom at the Alpine World Ski Championships . U.S. teenager and first American to successfully defend a slalom world title in 10 years . Second U.S. gold after Ted Ligety in giant slalom . NEW : Jean - Baptiste Roy wins concluding men 's slalom at Calgary .