Julia Kern finds herself heading into an Olympic season as one of the veterans for the US women’s cross country ski team. At the age of twenty-three, she’s ready to take on the leadership role left by the retirements of long-time team members Sadie Maubet Bjornsen and Sophie Caldwell Hamilton. After a lackluster season — by her own lofty standards — she has shaken off the disappointment, along with a hamstring injury she picked up...