mountains and northern plains. the next major threat, it's coming friday, with millions in the east bracing for several inches of snow snow from tennessee to washington, d.c. to boston. some areas could get half a foot. all right, here in washington, one year ago tonight, political tensions were on the virginia of exploding as lawmakers prepared for a final count of the electoral college votes, confirming that joe biden won the presidency. well, tomorrow, president biden will address the nation to mark one year since the deadly attack on the capitol. and we're learning more about what he's going to say. and cbs' nancy cordes is at the white house. good evening, nancy. >> reporter: good evening, norah. you know, that attack one year ago changed washington possibly forever, and tomorrow, in a speech at the capitol, president biden is going to lay the blame fr that attack squarely at the feet of his predecessor. according to white house officials, president biden will lay out the "singular responsibility" president trump