Millions prepare for massive winter storm

Tonight, a triple threat of blinding snow, life-threatening cold, and ice. Chaos already unfolding on roads across the country. High winds in Iowa nearly flipping this semitr.And drivers facing near zero visibility as lake effect snow in Michigan turns highways into white walls. Police in Indiana warning of slide offs on the road after this vehicle got stuck in the deep snow. And the bitter cold tonight punishing with wind chills plummeting to minus 31 degrees in Chicago.And in Duth, a staggering minus 51. ...