right now on andrea mitchell reports, a christmas surprise. ukraine s president zelenskyy flying at this hour to washington. the first time he left ukraine since putin invaded his country. seen switching trains in poland as he heads to the white house to meet with president biden later this afternoon. in a dramatic wartime appearance, reminiscent of churchill, zelenskyy will address a joint session of congress, a joint meeting of congress tonight at 7:30 eastern. bringing with him a flag he received from front line soldiers yesterday to present to the president and congress. also here in washington, january 6 committee releasing its final report today as we learn the committee is fully cooperating with the justice department. we are expecting new details about alleged pressure on key witnesses to withhold information and the slow emergency response in deploying the national guard.