Athing Mu, the defending Olympic gold medalist in the 800-meter race, tripped and fell during trials Monday, ending her bid to make the U.S. team headed to the Paris 2024 Olympics.

A gunman opened fire at an Arkansas grocery store Friday, killing at least three and wounding several others, authorities said.

© Colin Murphey

© Colin Murphey

A gunman opened fire at an Arkansas grocery store Friday, killing at least two and wounding several others, authorities said.

U.S. Surgeon General Vivek Murthy on Monday called on Congress to require a tobacco-style warning for visitors to social media platforms.

As the solstice approaches, a strong heat wave is hitting the East Coast and Midwest. It's expected to last through Friday and beyond.

Hundreds of students streamed out of commencement at California's Stanford University on Sunday as part of the spring wave of pro-Palestinian protests on American college campuses.

Nine people, including two children, were injured in an apparent random mass shooting Saturday at a city park's splash pad in Michigan, authorities said.

Four people were hospitalized after a bull escaped an arena at an Oregon rodeo and charged into patrons outside, authorities said Sunday.