As frustrations mount on day three of the search for Nancy Guthrie, Trevor Ault has the latest on the race to find "Today" host Savannah Guthrie’s mother; Martha Raddatz reports on the U.S. fighter jet that shot down an Iranian drone after it started to approach the USS Abraham Lincoln in the Arabian Sea; after The Walt Disney Company named Josh D'Amaro as the next CEO, David Muir sits down for an exclusive interview with D'Amaro and Bob Iger, the current chief executive, to discuss the future of Disney; and more on tonight’s broadcast of World News Tonight with David Muir. 00:00 Intro 02:30 Race to find "Today" host Savannah Guthrie's mom as search enters third day 05:18 U.S. fighter jet shoots down Iranian drone approaching USS Abraham Lincoln in Arabian Sea 06:57 8 more federal prosecutors to step down after deadly Minnesota shootings of Renee Good, Alex Pretti 08:20 New video shows FBI agents raid the election office in Fulton County, Georgia 10:09 ABC News Exclusive: David Muir ...