Mary Bruce reports on President-elect Donald Trump choosing RFK Jr. to lead the Department of Health and Human Services, and Rachel Scott has details on what sources tell ABC News the House Ethics Committee heard during their investigation into allegations of sexual misconduct by Florida Rep. Matt Gaetz; Stephanie Ramos has the latest on the Miami-bound flight from Stockholm that encountered severe turbulence over Greenland and made the unusual decision to turn around and head back toward Europe; Aaron Katersky reports on the families associated with the Sandy Hook massacre backing The Onion's purchase of Alex Jones' Infowars at a bankruptcy auction; and more on tonight's broadcast of World News Tonight with David Muir.