A South Korean official says North Korea is capable of conducting another nuclear test anytime at one of its unused tunnels at the country's main atomic test site.
Hillary Clinton's diagnosis of pneumonia is a serious concern, but something from which she soon should recover, several doctors and medical experts said Sunday.
Rebel factions in Syria expressed deep reservations on Sunday about the terms of a U.S.-Russian deal that seeks to restart the peace process for the war-torn country, with the leader of at least one U.S.-backed rebel faction publicly calling the offer a "trap."
Tesla CEO Elon Musk says the electric car company is making major improvements to the Autopilot system used by its vehicles, which will dramatically reduce the number and severity of crashes in which they are involved.
A school bus driver was killed and several others were seriously injured Sunday after the bus veered off a roadway Denver International Airport and crashed into a concrete wall, officials said.
Alexis Arquette, the transgender character actress and sibling of actors David, Rosanna, Richmond and Patricia Arquette, died early Sunday morning in Los Angeles. She was 47 and surrounded by family who serenaded her with David Bowie's "Starman," her siblings said in a statement Sunday.
Pointing to his temple after winning the biggest of points, Stan Wawrinka wore Novak Djokovic down and beat the defending champion 6-7 (1), 6-4, 7-5, 6-3 on Sunday for his first U.S. Open title and third Grand Slam trophy overall.
More than 6,000 gallons of oily water have been recovered at the site of a spill near Louisiana's Bay Long that has covered dozens of birds in crude, the Coast Guard said Sunday.
Nearly 160 years after the massacre of a wagon train in southern Utah, the pioneers' descendants got their first glimpse of what is believed to be their gravesites.
Dustin Johnson was powerful off the tee and relentless with the putter, closing with a 5-under 67 to win the BMW Championship by three shots and move to the top of the FedEx Cup.
Hillary Clinton appeared to stagger and faint in footage showing her early exit from a 9/11 commemoration ceremony on Sunday, though Clinton's doctor said the episode was a result of heat and dehydration -- and revealed she had been diagnosed with pneumonia two days prior.
A security checkpoint at Albuquerque airport has been shut down while authorities investigate a suspicious item, leaving dozens of travelers anxiously waiting to board flights.
There was no evidence that a Tampa-area firefighter deliberately left his toddler son in a hot pickup truck for eight hours, but the circumstances amount to criminal neglect, a sheriff told a Florida newspaper.