A volley of shots rang out outside the U.S. Capitol building on Thursday, sending lawmakers and tourists scattering for cover and triggering a massive security operation.

Police said one officer was hurt in a vehicle crash during the incident. An Agence France Presse photographer saw at least one person receiving emergency medical assistance on the north side of the complex.

Justin Bieber won't face criminal charges for allegedly threatening a neighbor who complained about his driving.

City News Service says Los Angeles County prosecutors decided Wednesday that there's insufficient evidence to charge the pop star.

Borussia Dortmund coach Juergen Klopp must serve a two-match Champions League ban for his "irresponsible" rant at a match official.

UEFA said the automatic one-match suspension after his sending off for "pestering a match official" has been increased to a two-match sanction.

With the magical sound of wooden flutes, the scent of incense, and the warm Andean sun making shadow patterns across the rolling hills, this event has all the hallmarks of a happy, festive occasion. Families spread out picnics; strolling musicians and vendors sell cotton candy, toys, flowers and food.

But this celebration is taking place in a cemetery, el Cemeterio de Nueva Esperanza, one of the largest cemeteries in the world. And the event is the Day of the Dead, celebrated throughout Latin America on Nov. 1, a day after American kids go trick-or-treating for Halloween.

A model of Pablo Picasso's famed Chicago sculpture will be auctioned next month and Christie's estimates it will sell for between $25 million and $35 million.

The late Spanish artist created the piece, named "Tete," between 1962 and 1964. The iron and sheet metal model that goes to auction on Nov. 4 in New York is 41 ½ inches (11 centimeters) tall and 27 ½ inches (0.69 meters) wide. It was later made into the 65-foot (20-meter)-tall, welded-iron sculpture unveiled on Aug. 15, 1967 in Chicago's downtown Daley Plaza.

Scientists have discovered ancient supervolcanoes on Mars similar to the caldera that sits under Yellowstone National Park.

Volcanoes previously have been spotted on Mars, which is known to have been volcanically active billions of years ago.

China for years has welcomed the world's trash, creating a roaring business in recycling and livelihoods for tens of thousands. Now authorities are clamping down on an industry that has helped the rich West dispose of its waste but also added to the degradation of China's environment.

The Chinese campaign is aimed at enforcing standards for waste imports after Beijing decided too many were unusable or even dangerous and would end up in its landfills. Under the crackdown dubbed Green Fence, China has rejected hundreds of containers of waste it said were contaminated or that improperly mixed different types of scrap.

A Lebanese-born cancer doctor accused of intentionally misdiagnosing patients and ordering unnecessary treatments will remain in jail until trial, a judge said Wednesday after prosecutors insisted he might flee to the Middle East.

Dr. Farid Fata, in custody since Aug. 6, wanted the judge to lower his $9 million bond to $500,000 and give him a chance to win release.

They were mystery diseases that had stumped doctors for years — adults with strange symptoms and children with neurological problems, mental slowness or muscles too weak to let them stand. Now scientists say they were able to crack a quarter of these cases by decoding the patients' genes.

Their study is the first large-scale effort to move gene sequencing out of the lab and into ordinary medical care, and it shows that high hopes for this technology are finally paying off.

Expecting twins? You probably don't need to schedule a cesarean section. Most moms can safely give birth without surgery, a big study finds.

It's the latest research to question the need for C-sections, which are done in one-third of all births in the United States and three-fourths of those involving twins. Studies increasingly are challenging long-held beliefs about cesareans, such as that women who had one need to deliver future babies the same way.