David Muir anchors World News Tonight from the National Constitution Center in Philadelphia, where Vice Pres. Kamala Harris and former Pres. Donald Trump will face off in the ABC News presidential debate and make their cases to the American people; Steve Osunsami has details on the Delta passenger jet that clipped a smaller Delta plane on a taxiway at the world's busiest airport in Atlanta, Georgia, tearing the tail off the smaller plane, officials said; Victor Oquendo reports on the newly released police body camera video showing the moment NFL Dolphin's star player Tyreek Hill was forcibly taken from his car by police and detained for a traffic violation; and more on tonight's broadcast of World News Tonight with David Muir.