ABC's Trevor Ault reports from upstate New York, where lake-effect snow has been slamming the Great Lakes region; Somara Theodore times out the forecast with millions of Americans under winter weather alerts for the first time this season; Jay O'Brien has the latest on the ally Pres.-elect Trump's has picked to lead the FBI as he seeks to upend the federal agency; and more on tonight's broadcast of World News Tonight.

Martha Raddatz reports on South Korean Pres. Yoon – a key U.S. ally – facing growing calls to resign after he suddenly declared "emergency martial law;" Erielle Reshef has the latest on the rescue mission underway for a Pennsylvania grandmother who may have fallen into a 30-foot sinkhole while looking for her cat; Aaron Katersky has details on the FBI's investigation into multiple reports of large drones in New Jersey over the last two weeks, some of which were spotted near President-elect Trump's Bedminster golf course; and more on tonight's broadcast of World News Tonight with David Muir.