BEITOSTØLEN, Norway — Team USA led the participation numbers while Russia topped the medal table in the 2019 Masters World Cup, the annual competition for skiers aged 30 and over that wrapped up in this mountainside hamlet on Thursday. Roughly 1,000 skiers from 26 different nations, from the predictable (Norway, Finland) to the unexpected (Thailand!), made their way to the Oppland region for seven days of competition and up to four races per athlete, three...