Sgt. Nick Cunningham, a bobsledder, is one of seven U.S. service members competing in Pyeongchang. "They told me, 'Go win medals for this country,'" he says. "And that's my job at this moment."
U.S. Olympic bobsledders explain their craft as they prepare for Pyeongchang in 2018. Success depends on immense precision. One false step or a miscalculated lean can spell disaster.