With just over three weeks until Election Day, Mary Bruce reports as both Vice Pres. Harris and former Pres. Trump battle it out in the swing state of Pennsylvania; Victor Oquendo has the latest on the suspect who's been arrested in North Carolina accused of threatening to harm FEMA workers in the state; Matt Gutman has details on the U.S. deploying 100 troops to Israel to operate an advanced anti-missile defense system; and more on tonight's broadcast of World News Tonight with David Muir.