@pbsnews: U.S. skiing star Michaela Shiffrin became the first skier to win 100 World Cup races. The milestone came on Sunday when she won a slalom event in Italy by 6/10 of a second. Afterward, Shiffrin thanked her teammates and competitors for their support. She only returned to competition three weeks ago after recovering from a serious accident in November. No other downhill skier, male or female, has ever won more than 86 World cup races. #ski #skiing #record #news #pbs #pbsnews