Stifling sobs, Oscar Pistorius took the witness stand Monday in his murder trial and apologized to the family of the girlfriend he shot dead, describing himself as being traumatized and awakening from nightmares to the "smell of blood."

Pistorius' voice quavered so much and was so low that Judge Thokozile Masipa asked him to speak up to the packed courtroom as he described his remorse for having killed Reeva Steenkamp on February 14, 2013. He said he mistook her for an intruder when he fired four times through a locked toilet stall door in his home. Prosecutors said he shot her as she screamed in terror after they had an argument in the predawn hours of Valentine's Day.

A sell-off of Internet and technology stocks that started on Wall Street spread around the globe on Monday, with tech companies in Asia hammered by worries about excessively high valuations.

Mainstays of the Internet economy such as Google and Netflix that have surged over the past year were hammered on Friday as investors had a change of heart and decided prices were too high. The technology-heavy Nasdaq had its biggest one-day drop since February.

The head of the United Nations scientific panel on climate change has urged governments to "exercise a high level of enlightenment" in order to bridge their differences over how to stave off the worst global warming scenarios.

Intergovernmental Panel on Climate Change chairman Rajendra Pachauri told governments and scientists on Monday that their task at the week-long meeting in Berlin is to agree on a "robust, policy-relevant and informative document" in order to keep global temperature increases below 2 degrees Celsius (3.6 F) by the end of the century.

Formula One chief Bernie Ecclestone says a U.S.-backed team led by NASCAR's Gene Haas is among two new teams likely to join the series next season.

Speaking at Sunday's Bahrain Grand Prix, Ecclestone said he held talks with the sport's governing body and there was agreement about expansion next season.

Liverpool reclaimed top spot in the Premier League after two penalties from captain Steven Gerrard helped his team beat West Ham 2-1 Sunday to remain firmly in the hunt for the club's first league title since 1990.

Liverpool's ninth win in a row restored a two-point lead over Chelsea with five games to play, and also sets up a crucial game against Manchester City next weekend which could go a long way to determining who wins the title.

Ana Ivanovic won an all-Serbian final at the Monterrey Open on Sunday, beating Jovana Jaksic 6-2, 6-1 for her second title of the year.

Ivanovic, the 2008 French Open champion, also won the ASB Classic in Auckland, New Zealand, to start the year. It's the first time since 2010 she has captured multiple titles in a season.

Jeff Teague scored 25 points to lead the Atlanta Hawks to a 107-88 rout of the reeling Indiana Pacers, who were held to a club-record-low 23 points in the first half of an embarrassing performance on their home floor Sunday.

The Pacers, the NBA's best home team, have lost four of five and fell a full game behind the Miami Heat in their quest for the No. 1 playoff seed in the Eastern Conference. Paul George scored 18 points and David West had 17 on a night All-Star center Roy Hibbert did not play the final 30 minutes.

An experimental drug has shown encouraging results in treating advanced breast cancer in an early clinical trial, pharmaceutical giant Pfizer reported Sunday.

Pfizer, the world's second largest drugmaker, said the drug prevented breast cancer from worsening for 20.2 months in a trial involving 165 patients. Current medications do so for 10.2 months. The drug, known as palbociclib, is among a new class of cancer drugs that target specific proteins to block tumors.

Best sellers by novelist Donna Tartt and historian Doris Kearns Goodwin are among the finalists for the Andrew Carnegie Medals for Excellence in Fiction and Nonfiction.

The fiction nominees are Tartt's "The Goldfinch," Edwidge Danticat's "Claire of the Sea Light" and Chimamanda Ngozi Adichie's "Americanah."

Hundreds of Tetris fans had a little fun Saturday with a big version of the classic video game.

The Philadelphia skyscraper-sized version created a spectacle against the night sky that organizers hoped inspired onlookers and players to think about the possibilities of technology.