news coming in on moderna. another major vaccine. what the fda is now saying about this second potential vaccine. the key findings coming in tonight. and how effective is it at stopping asymptomatic spread of the virus? 6 million doses on stand-by. could we have those two vaccines approved and under way by christmas? the major snowstorm targeting the northeast tomorrow. we're tracking the nor'easter. new york city could see up to a foot of snow. significant snow and rain from philadelphia right up through new england. ginger zee with the latest track and timing tonight. this evening, senate majority leader mitch mcconnell congratulating president-elect joe biden and vice president-elect kamala harris on the senate floor. what mcconnell said about history made. the president-elect joe biden in georgia today. the control of the senate to be determined by those two senate races. and tonight here, robin roberts one-on-one with vice president-elect kamala harris. newly released video moments after the deadly shooting of ahmaud arbery. two men, a father and son, chasing him through a neighborhood.