uptick in hospitalizations, health officials remain optimistic. if things go as we expect, the hospitals will remain quiet, and that s really what the power of the vaccines and the immunity force field is. reporter: some travelers say they re prepared to deal with airport crowds and covid. i wear a mask out in public all the time now. and i m probably not going to get stop doing it for a while. reporter: with covid cases rising, the federal mask mandate on public transportation that was supposed to be lifted on monday has now been extended for another two weeks at least. adriana. diaz: all right, lilia luciano, thank you. those of us not on the move may be working on our taxes before monday s deadline. cbs debra alfarone is at the white house with more. debra, good evening. reporter: good evening, adriana. and the last minute is officially here. if you think you re behind on your paperwork, the i.r.s. may have you beat. they have about three million returns they are still