Sleet, freezing rain, and arctic cold. >> we're never prepared for it, but it is what it is. >> reporter: interstate 70 near kansas city grinding to a halt, littered with semis turned like toys. a jackknifed fedex truck along an illinois interstate, snow piling up so quickly near peoria, cars stopped in their tracks. >> let the plows do their thing and come out later on because it's one lane, and you're sliding all over the place. >> reporter: airlines canceled more than 5,000 flights today and tomorrow. tonight, concern about sleet and ice in texas, almost a year after a freeze there led to o...