KILLINGTON, Vt. — Mikaela Shiffrin sliced through the fog to grab the first-run lead Sunday at Killington as she chases after a third straight World Cup slalom win. Wearing bib No. 3, the 23-year-old from Colorado finished in 52.49 seconds to take a 0.29 second advantage over Bernadette Schild of Austria into the final run.