captioning sponsored by cbs o donnell: toni confusion, st airlines cans also thousands of flights, leaving passengers stranded. could a pilot walk out over vaccine mandates be the cause? passengers soundoff after mask cancellations. not a great end to a good vacation. o donnell: tonight, the blame game. storms in the upper midwest. tornadoes in oklahoma and snow in the rockies. the latest on the severe weather. plane crash, homes destroyed when a small aircraft plunges into a california neighborhood. breakthrough treatment the first pill to treat covid is a step closer to authorization. plus new research on the