year. we ll have the full forecast fom lonnie quinn in jus moment, but adriana diaz leads us off from chicago s busy o hare airport. adriana, good evening. reporter: good evening. grah this checkpoint has been pretty full the past few hours prd it s just day one of t.s.a. s holiday travel season. this week they expect to break pee record for the busiest day of u.s. air travel in history. weather will be a factor both in the air and on the roads. lrowy weather is already causing erief and white knuckles on highways in colorado. daniele chefir slid into a ditch. this morning, getting to work was really terrifying. reporter: more than 49 million people will hit the road for thanksgiving, and some l b,000 cars will break down. that s according to aaa. it s no wonder, then, that more americans than ever are opting to fly. according to the t.s.a., a record-breaking 26.8 million