Rob Marciano tracks the powerful weather system marching east that’s put millions under tornado threat and brought at least 16 confirmed tornadoes to four states; Gio Benitez has details on the former and current Boeing employees testifying about safety concerns on Capitol Hill; Mireya Villarreal reports on the court appearance of the four suspects accused in the murder of two Kansas mothers who were on their way to pick up children for a birthday party; and more on tonight’s broadcast of World News Tonight with David Muir.

00:00 Intro
02:46 Millions under tornado threat as powerful weather system marches east
05:33 Impeachment charges dismissed against DHS Secretary Mayorkas
07:19 Arizona Republicans block legislation to repeal near-total abortion ban
09:42 Whistleblower takes on Boeing at Senate hearing on safety culture
11:57 Israeli military base attacked by Iran-backed militant group Hezbollah
13:58 Grandmother at center of Kansas missing mothers' alleged murder plot arraigned
15:44 Biden campaigns in battleground Pennsylvania as Trump faces criminal trial
17:27 Authorities: Officer shot during ambush in Albany, New York
17:52 NBA bans Toronto Raptors' Jontay Porter for life over gambling scandal
18:06 NASA confirms International Space Station object crashed through Florida home
18:30 Hundreds of ballerinas gather at New York's Plaza Hotel to break world record

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.

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