ABC World News Tonight with David Muir Full Broadcast - March 20, 2026

By ABC News

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James Longman has the latest on the war in Iran as the U.S. deploys an additional 2,200 Marines to the Middle East while the Trump administration weighs options on how to reopen the Strait of Hormuz; Aaron Katersky reports on law enforcement officials warning of “a significant threat to public safety and national security” after swarms of high-tech drones entered the airspace over a U.S. base housing B-52 bombers and the Air Force’s nuclear command; Steve Osunsami looks back at the life and legacy of actor and martial arts master Chuck Norris, who has died at age 86; and more on tonight’s broadcast of World News Tonight with David Muir. --------------------- 00:00 Intro 02:32 2,200 more U.S. Marines head to Mideast as Trump is pressed on possible ground mission 07:29 TSA lines stretch into parking lot at some of America's busiest airports 10:16 Swarms of mystery drones over major U.S. Air Force base raise alarm 11:51 Dangerous flooding on Hawaii's Oahu island as unprecedented heat w

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