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Emma Bowman

Before Lori Alhadeff ran for a seat on her local school board, she had no experience in politics. She didn't even consider herself a "political person," she says.

That changed when her daughter, Alyssa Alhadeff, died in the Parkland school shooting. In February, a former student killed 14-year-old Alyssa and 16 other people at Marjory Stoneman Douglas High School.

Updated at 1:00 p.m. ET Sunday

Sen. John McCain died Saturday, a day after his office announced his decision to discontinue medical treatment for brain cancer. Before his death, McCain's wife Cindy said in a tweet that the McCain family was "overwhelmed by the outpouring of love and support from around the world."

That outpouring swelled after the news of his death broke on Saturday.

Jimmy Fallon made a surprise visit at Marjory Stoneman Douglas High School's graduation ceremony on Sunday, nearly four months after the students survived a shooting that killed 17 of their classmates and teachers.

A new exhibit that opens Monday at the United States Holocaust Memorial Museum aims to honor a founding mission.

Five years in the making, "Americans and the Holocaust" contextualizes attitudes in the U.S. during 1930s and '40s persecution and mass murder of Jews in Europe.

Twenty-five years ago, when the building opened, noted Holocaust survivor Elie Wiesel introduced the museum not as an answer to the horrors of genocide but to pose a glaring question: How could this happen?

Brothers Russell, 28, and Remmick Wadsworth, 27, have autism. As kids, they had trouble with social interactions, so they often relied on each other for support during tough situations. Now, as the siblings navigate the working world, they're still looking out for each other.

Remmick remembers his first job, working with his older brother in a coffee shop. "You would always have my back, talking to customers for me, handle them for me while I make their drinks," he tells Russell during a StoryCorps conversation.