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Recommendations we get from websites about what to buy are often powered by an algorithm known as collaborative filtering. We trace this technology back to one person trying to declutter his inbox.

Hackers in Russia are responsible for recent ransomware attacks. NPR's Leila Fadel talks to threat intelligence analyst Dmitry Smilyanets about cyber criminals.

The Trump Justice Department subpoenaed Apple in 2018 to obtain metadata of at least two Democratic members of the House intelligence panel — as well as their current and former staff and family.

Attorney General Merrick Garland met with The New York Times, CNN, The Washington Post — all news organizations that the Justice Department secretly investigated in search of leaks.

The impact ordinary Russians face from President Vladimir Putin's recent crackdown on the media and the opposition could be an issue at the forthcoming summit with President Biden.

Casey Klein, director of Geneva Glen Camp in Colorado, talks about what the first weeks of summer camp has been like for kids who missed out last year because of the pandemic.

Noting the Tour's status as the world's marquee cycling event, pro cyclist Anna van der Breggen says, "It's long been a dream for many of us to compete in a women's Tour de France."

Renee Montagne talks to historian John Coski of the Museum of the Confederacy in Richmond, Va., about the history of the Confederate battle flag, and why it symbolizes so many different things.

Lordstown Motors doesn't have enough cash on hand to produce its long-promised electric pickups. And this week it admitted it exaggerated its preorders, and its CEO and CFO stepped down.

Simone Biles has won her seventh U.S. title, making her the most decorated gymnast ever. NPR's Mary Louise Kelly talks with sportswriter Liz Clarke about Biles' outstanding career and Olympic effort.