NPR Staff

United Nations via / YouTube

Climate activist Greta Thunberg, 16, addressed the U.N.'s Climate Action Summit in New York City on Monday.

Zhou Fengsuo was a top university student when the first protests broke out in the heart of the ancient imperial city of Beijing, set off by the death of reformist leader Hu Yaobang in April 1989.

Updated at 9:37 p.m. ET

The Justice Department has released a redacted copy of special counsel Robert Mueller's report into Russian interference in the 2016 presidential election.

» A copy of the document is available here.

On Feb. 14, 2018, a gunman killed 17 people at Marjory Stoneman Douglas High School in Parkland, Fla. In the aftermath, led first by students at Marjory Stoneman Douglas, teenagers around the country initiated an unprecedented wave of youth activism for gun control. Teenage voices from all sides of the issue weighed in, and in the months that followed, they helped reinvigorate one of the nation's longest-raging debates.

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