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Researchers are trying to come up with tests that can be performed using a blood sample that will determine not only whether a COVID-19 vaccine will work but also for how long.

A U.S.-backed conference with the Taliban and Afghan government was derailed, raising doubts about progress toward a negotiated settlement to end decades of war in Afghanistan.

The Trump administration rolled back the regulations last year, a move that was so controversial even some oil companies opposed it. Methane is an even more potent greenhouse gas than carbon dioxide.

President Biden's American Families Plan includes education proposals so ambitious and expensive that in previous years, any one of them would have turned heads.

To her family in southern China, Feng Daoyou remains a mystery. They remember her as generous and headstrong but they knew little of her life in the U.S. She was among eight people killed on March 16.

NPR's Audie Cornish talks with Heather Boushey, an economist on the White House Council of Economic Advisers, about President Biden's American Families Plan.

Federal investigators in Manhattan executed a search warrant on Rudy Giuliani's apartment as part of a probe into the former New York City mayor's activities involving Ukraine, his attorney told NPR.

President Biden gives his first big speech to Congress tonight. It's a chance to lay out his legislative plan, including sweeping investments in childcare, education and paid leave.

Gregory McMichael, his son Travis McMichael and William "Roddie" Bryan face charges of attempted kidnapping and hate crimes in the death of Arbery, a Black man gunned down while on a run last year.

"After just 100 days, I can report to the nation: America is on the move again," President Biden said in his remarks to lawmakers.