Selina Wang has details on the combative hearing where Senators grilled tech CEOs over the threats social media platforms pose to children; Martha Raddatz reports on the White House officially identifying the Iran-backed militants behind the drone attack that killed three American soldiers in Jordan; Pierre Thomas has the latest on the arrest of a Pennsylvania man accused of killing and decapitating his father, a longtime federal worker; and more on tonight’s broadcast of World News Tonight with David Muir.

00:00 Intro
02:25 Tech CEOs grilled over child safety on social media platforms
06:20 White House: Islamic resistance group in Iraq responsible for deadly attack in Jordan
09:24 New storms fueled by atmospheric river slam the West Coast
10:30 Pennsylvania son accused of beheading father
12:19 Florida man facing charges after four-year-old girl shot in road rage incident
13:27 Trump slams bipartisan border bill as negotiations continue
14:58 New details in "Rust" movie set shooting reveal concerns over armorer
16:45 Federal Reserve leaves interest rates unchanged
17:25 NYPD: 5 asylum-seekers arrested for assault on officers in Times Square
18:02 FDA warns about potentially contaminated counterfeit eye drops
18:35 The James Webb Telescope captures 19 spiral galaxies

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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