this morning on " this morning on "world news now" -- breaking news. divers just made a major discovery in the search for the missing airasia jet. will it help investigators solve the mystery of the doomed flight. unprecedented cold. windchills dropping again into the danger zone. an arctic freeze far from over. many schools are closing and roads are downright dangerous. >> just go slow and put it in four-wheel drive. >> the polar plunge hitting much of the country and predictions from accuweather. keeping your resolutions for a new year using a high-tech tool to zap you when you stray. >> there's a real power in using a little bit of pain to help you break your bad habits. >> is it safe to rely on pain to exercise and lose weight? see for yourself on this wednesday, january 7th.