Nearly 3000 athletes have made their way to the Winter Olympic this month, and probably at least a couple are cursing the day they ever decided to become world-class bobsledders: Reports out of Pyeongchang list the temperature at or around a murderous -18C, putting this year's games on track to be the coldest since 1994 - with matters not much helped by the fact that, in their haste to get a stadium in shape, South Korea's builders neglected to include a roof.