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Toby Walsh, A.I. Expert, Is Racing to Stop the Killer Robots

Would You Want a Computer to Judge Your Risk of H.I.V. Infection?

Ahead of Debates, Pennsylvania Democrats Lean More Pragmatic Than Progressive

Gilroy’s Garlic Festival Turned a Stinky Ethnic Food Into a Symbol of Multicultural America

China Says It Has Freed Most Muslims Held in Camps. That’s Difficult to Prove.

What’s on TV Tuesday: The ‘Bachelorette’ Finale and Whitney Cummings

Your Tuesday Briefing

Domingo German Helps Yankees Avoid Four-Game Sweep to Boston

Facebook Connected Her to a Tattooed Soldier in Iraq. Or So She Thought.

5 Things to Know About Military Romance Scams on Facebook

While Reporting on Facebook Scams, an Unexpected Tragedy

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