and good evening and welcome to "world news tonight." i'm tom llamas, in for david. and we begin with that deadly winter wallop, striking the day after christmas, as millions of americans travel for the holidays. snow falling from coast to coast. eye-popping accumulations in parts of pennsylvania and upstate new york. more than 50 inches in some spots. and it's not just snow. wind chill alerts in 20 states. this time lapse video from duluth, minnesota, where temperatures hit 21 degrees below zero. causing steam and fog to rise from lake superior. four killed in one interstate crash in kansas. slow going from the great lakes through the northeast. and a frightening moment at boston's logan airport, when a jet blue passenger plane skidded out after landing in slick conditions. airline delays stacking up tonight as that arctic blast moves east. abc's alex perez gets us started in new york.