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In a Jeopardy-style game at the annual Def Con hacking convention in Las Vegas, hackers tried to get chatbots from OpenAI, Google and Meta to create misinformation and share harmful content.

The once-mighty U.S. Olympic swim team has only won two gold medals so far at the Paris Games. Athletes say the sport has grown more competitive since Americans like Michael Phelps owned the pool.

Cervical cancer is preventable, but kills thousands each year — in part because women aren't regularly screened for it. A new test allows people to test themselves at home and mail in the results.

NPR's Rachel Martin talks to sprinter Allyson Felix, an Olympic champion, about her contract with Nike through pregnancy.

Democrats are highlighting concerns over health care costs in Wisconsin, a key swing state. The Trump administration says they have a plan of their own coming together to address health costs.

We hear a lot less about Afghanistan these days, but America's longest war isn't over. The U.S. military still has nearly 10,000 personnel in the country assisting the Afghans.

President Trump tweeted Thursday evening that former U.N. ambassador John Bolton would replace national security adviser H.R. McMaster. McMaster also released a statement about his retirement.

"I told them I didn't want to make a scene about it, but my conscience wouldn't let me talk to him," says William Owens of the chance to meet President Trump. Owens' son died in a raid in Yemen.

The Department of Homeland Security requested the troops. President Trump says he is intent on stopping any people in a migrant caravan from crossing the U.S. border.

George Papadopoulos was convicted for lying to the FBI during the probe looking into Russia's role in the 2016 election. Now he's seeking a House seat that will be vacated by Democrat Katie Hill.