ABC World News Tonight (Mar. 21, 2025)

Marcus Moore reports on the travel chaos that unfolded after an electrical substation caught fire at London’s Heathrow Airport and caused a significant power outage, forcing a complete shutdown of one of the world's busiest airports; Martha Raddatz has details on the two U.S. officials that confirmed a scheduled Pentagon meeting between Elon Musk and the Joint Chiefs was changed after a New York Times report said the meeting would include a top secret briefing on plans for a potential war with China; Melissa Adan has the latest on the urgent search for three women from the same family who went missing while driving after visiting the Grand Canyon; and more on tonight’s broadcast of World News Tonight. 00:00 Intro 02:24 Heathrow Airport electrical substation fire triggers shuts down airport for hours 05:22 Trump denies Musk was going to be briefed on potential China war plans 08:10 Judge grills DOJ attorneys on deportation flights to El Salvador 11:24  Sources: Growing threats to judges across the nation 11:48  Columbia University announces policy changes after Trump threatens to revoke federal funds 12:17 Three women from same family missing after visiting Grand Canyon 14:00 Tracking the new cross-country storm sweeping east and wildfire in Florida 15:30 Sherri Papini, mother who faked kidnapping, seeks custody over her 2 children 16:01 Trump says anyone caught vandalizing Teslas should go to jail for up to 20 years 16:31 School-aged child dies in Texas measles outbreak; more cases nationwide than all of 2024 16:54 Actor Jack Lilley, known for role on 'Little House on the Prairie,' dies at age 91 17:19 America Strong: Student manager helps McNeese State defeat Clemson during March Madness ABC World News Tonight with David Muir delivers the news that matters most. Watch to get the latest news stories and headlines from around the world. Watch World News Tonight every Weeknights at 6:30pm ET on ABC and Streaming on Hulu. Follow ABC World News Tonight on Social Media Instagram:   / abcworldnewstonight         TikTok:   / abcworldnews       X (formerly Twitter):   / abcworldnews       Facebook:   / worldnewstonight       #WorldNewsTonight