Leif Zimmermann is one of only two athletes in West Yellowstone with European racing experience this winter. But he’s also one of two athletes coping with the effects of a transatlantic jet flight, making a pair of sensational performances this weekend even more impressive. With his 20-second victory in Saturday’s 10 k classic, Zimmermann (BSF) won for his third time in four years in West Yellowstone, less than one week removed from racing 4,500 miles...