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Brazil's president is teetering as angry crowds protest her attempt to name her predecessor to her cabinet — in what critics say is an attempt to shield him from prosecution.

Donald Trump has a clear if not guaranteed path to the GOP nomination, but could he win the White House? NPR explains what would have to happen in the battle for electoral college votes for him to succeed.

Major automakers have agreed to install automatic braking systems on nearly all models by 2022. Federal regulators say the technology will prevent thousands of crashes. Through the use of sensors, the systems detect imminent crashes and apply the brakes even if drivers don't react.

Four men who worked for the private military security firm formerly known as Blackwater were handed decades-long sentences Monday in connection with a shooting in Baghdad that left 17 civilians dead.

Monarch butterflies have arrived in Mexico, and conservationists are applauding the country's crack down on illegal loggers who contributed to habitat loss and decline of the species. Now they are turning their attention to the U.S. to help save the migratory insect.

NPR's Robert Siegel speaks to Ray Kurzweil, the inventor and futurist, and founder of Kurzweil Technologies, Inc., about Marvin Minsky. Minsky, who was a founding father of artificial intelligence, has died at the age of 88.

An independent task force chartered by the federal government says pregnant women should be screened for signs of depression both during and after pregnancy.

For all the presidential aspirants, just three have launched exploratory committees. The others are jumping through hoops to make clear that they're just thinking about the possibility of running.

Former Secretary of State Hillary Clinton's private email account is raising eyebrows, while a new report says just a tiny fraction of a percent of all emails are being preserved.

Authorities in the Florida Panhandle are trying to find out why a military Black Hawk helicopter crashed overnight. All 11 people on board are believed to have died.