Alex Perez reports on the deadly shooting at a Christian K-12 school in Madison, Wisconsin, sources say a female student opened fire, killing a teacher and a student and wounded six others; Whit Johnson has the new details on the FBI and Dept. of Homeland Security deploying drone detection technology and infrared cameras to New York and New Jersey after a spike in unexplained drone sightings in at least seven states; Mary Bruce has details on President-elect Trump's controversial cabinet pick for the Dept. of Health and Human Services, Robert F. Kennedy Jr., meeting with Republican senators on Capitol Hill to defend himself after years of spreading false theories about vaccines; and more on tonight's broadcast of World News Tonight with David Muir.

Gio Benitez reports on the small single-engine plane on a training flight that crashed into an abandoned building shortly after takeoff in Honolulu, killing both pilots on board; facing fierce pressure from billionaire Elon Musk, Mary Bruce has the latest on Washington barreling towards a possible government shutdown; Steve Osunsami reports on California declaring a state of emergency in response to the rise of bird flu cases in the U.S; and more on tonight's broadcast of World News Tonight with David Muir.