SEEFELD, Austria — A gray sky shadowed over the Tirol ski trails on Sunday. A similarly cool tension built on the course as slightly more than 100 racers warmed up for the mass start of the men’s 15-kilometer freestyle mass start. With five minutes to spare, spectators hurried to stake their spot, some carrying steaming-cheese-fondue-filled baguettes from the Le Gruyère cheese tent: Switzerland’s stamp on the Austrian snow. For those on site, the Le Gruyère...