As Jessie Diggins looks to medal at a third straight Winter Olympics, Team USA is perfecting her skis on two state-of-the-art trucks.For the first time, American skiers will have their own wax and grind trucks at the Winter Olympics, closing the gap on the perennial contenders in the midst of an equipment arms race.Learn more: https://t.co/GKpJNFL65U📸: Hendrik Schmidt/Picture Alliance via Getty Images ...