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President Joe Biden said a strike carried out by the U.S. has killed Ayman al-Zawahiri, a top Al-Qaida leader and key plotter in the 9/11 attacks.

Explore the opening of Studio 54.

Watch chapter 1 of Influenza

How might science help avoid tragic deaths caused by landslides?

Civil rights activists in Huntsville, Alabama formed a “psychological warfare committee”.

Pilot André Borschberg reflects on his experience achieving what seemed impossible.

It changes the dynamic of the entire reefscape, and can be detrimental to corals.

Disneyland became a top destination for foreign dignitaries. Premieres 9/14 & 9/15 on PBS.

Max’s sister lectures him about his work and relationship with Clara.

Inspector Oskar Rheinhardt learns that Dr. Max Liebermann will be observing his case.