From start to finish on Saturday, Norway’s Therese Johaug commanded the front without missing a beat. By the 5 k mark, the top seven skiers, which included Norwegians Ingvild Flugstad Østberg and Astrid Uhrenholdt Jacobsen, Austrian Teresa Stadlober, Sweden’s Ebba Andersson and Frida Karlsson and American Jessie Diggins, as well as Johaug, had a close to 30 second gap on the field’s remaining 41 starters. But for anyone familiar with Johaug, it isn’t enough to...