David Muir, ABC's World News Tonight, America's Most Watched Newscast, now streaming same day with all the breaking news of the day on Disney Plus, most watched, most trusted.

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Tonight, multiple deadly attacks spanning the globe. Students shot at an elite American university.

The Jewish community targeted in Australia on the first night of Hanukkah

and Trump vows retaliation after American soldiers were killed in an attack in Syria.

We begin at Brown University where gunmen opened fire on students studying for final exams.

School buildings locked down.

Students sheltering in place, piling up chairs and tables against doors.

Hundreds of officers rushing to the scene.

Police released footage of who they believe may be a person of interest, and tonight

one man in his 20s is detained.

Law enforcement sources say he's from Wisconsin, how they tracked him down.

We speak with the teaching assistant who saw panic in his students' eyes and what he saw when he

came face to face with the gunmen. Team coverage with Whit Johnson and Pierre Thomas. Chaos in Sydney,

Australia. More than a dozen people killed hundreds seen running for their lives as

shots rang out at the iconic Bondi beach.

What we've learned about the suspects, a father and son, accused of targeting a Hanukkah

celebration.

Plus the remarkable moment when a bystander heroically confronted one of the two gunmen,

wrestling the weapon from his hands and suffering gunshot wounds.

Tonight security has increased at synagogues throughout this country.

Also tonight, the dangerous blast of Arctic air and the biggest December snowfall in New York City

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