ABC World News Tonight with David Muir Full Broadcast - Jan. 16, 2024

Less than 24 hours after Donald Trump's landslide victory in the Iowa caucuses, Rachel Scott has the latest on how candidates are turning their focus to New Hampshire's first-in-the-nation Republican primary; Stephanie Ramos has details on the new murder charge against alleged Gilgo Beach serial killer Rex Heuermann; Matt Gutman reports on the new round of airstrikes carried out by the U.S. against Iranian-backed Houthis in Yemen; and more on tonight’s broadcast of World News Tonight with David Muir.