The first COVID-19 vaccine tested in the U.S. revved up people’s immune systems just the way scientists had hoped, researchers reported Tuesday -- as the shots are poised to begin key final testing.

The Louisville Metro police department has fired one of the police officers involved in the fatal shooting of Breonna Taylor.

Republican Sen. Tim Scott proposes a national database of police officer-involved shootings. Sen. Rand Paul wants to stop sending surplus U.S. military equipment to local law enforcement. And Sen. Mitt Romney seeks a number of bipartisan bills in response to police violence.

IBM is getting out of the facial recognition business, saying it's concerned about how the technology can be used for mass surveillance and racial profiling.

President Donald Trump escalated his war on social media companies Thursday, signing an executive order challenging the liability protections that have served as a bedrock for unfettered speech on the internet.

Four Minneapolis officers involved in the arrest of a black man who died in police custody were fired Tuesday, hours after a bystander's video provoked widespread outrage with footage that showed the man pleading that he could not breathe as a white officer knelt on his neck.

The Georgia man who filmed cellphone video of Ahmaud Arbery's fatal shooting was arrested Thursday and charged with murder.

For the first time in nearly a decade, U.S. astronauts are about to blast into orbit aboard an American rocket from American soil. And for the first time in the history of human spaceflight, a private company is running the show.

Insect experts say people should calm down about the big bug with the nickname “murder hornet” — unless you are a beekeeper or a honeybee.

The slowdown in coronavirus cases out of China offers a sliver of hope that the global outbreak can be controlled, but whether that can happen anytime soon without drastic measures remains to be seen, public health authorities say.