With dramatic courtroom testimony, attorneys for Michael Jackson's doctor have dropped the bombshell they've been hinting at for months — an expert opinion accusing the singer of causing his own death.

Dr. Paul White said Jackson injected himself with a dose of propofol after an initial dose by Dr. Conrad Murray wore off. He also calculated that Jackson gave himself another sedative, lorazepam, by taking pills after an infusion of that drug and others by Murray failed to put him to sleep.

The Fukushima nuclear disaster released twice as much of a radioactive substance into the atmosphere as Japanese authorities estimated, reaching 40 percent of the total from Chernobyl, a preliminary report says.

The estimate of much higher levels of radioactive cesium-137 comes from a worldwide network of sensors.

For the first time, Samsung Electronics Co. shipped more smartphones in the latest quarter than tech industry darling Apple Inc. On the surface, this may look like a big upset in a world that affords the iPhone maker adulation and outsized expectations.

The real reason, however, has more to do with timing and Samsung's variety of offerings and prices.

Qantas Airways grounded its global fleet indefinitely Saturday in a lockout of workers whose strikes have disrupted airline operations for weeks, and the government said it would seek arbitration.

Flights in the air were continuing to their destinations. Booked passengers were being rescheduled at Qantas' expense, chief executive Alan Joyce said.

Hackers have hit the website of Nigeria's top anti-corruption agency over a government official suggesting tighter Internet control in Africa's most populous nation.

A group of hackers calling themselves NaijaCyberHacktivists claimed the attack Friday on the Economic and Financial Crimes Commission's site, which saw its usual home page replaced with a warning from the group. The hackers said the attack was a response to suggestions the government censor Internet content.

In the harsh, remote wilds of the Canadian tundra, a wolverine scampers up to a polar bear snoozing near the shore of the Hudson Bay. The bear rises and makes a half-hearted charge, driving away the fierce, badger-like animal.

The brief encounter Thursday was streamed live to computers around the world through a new program that aims to document in real time the annual migration of hundreds of polar bears outside Churchill, Manitoba.

Italy saw its borrowing costs rise to a euro-era high on Friday in a sale of euro7.9 billion ($11.09 billion) in government debt, a sign that investors remain nervous about the country's prospects despite a grand European plan to fight the debt crisis.

The interest rate demanded by investors to lend the Italian government 10-year money topped 6 percent in Friday's auction, the highest level since the launch of the euro, and surpassing the 5.86 percent paid in a similar debt auction a month ago. Demand exceeded the amount on offer 1.27 times, a relatively weak outcome.

Stocks edged lower in early trading Friday after appliance maker Whirlpool Corp. said it will cut 5,000 jobs, citing weak demand and higher costs for materials. Whirlpool slumped 11 percent, the most in the Standard & Poor's 500 index.

The modest decline followed a surge Thursday that put the Dow Jones industrial average on track for its best month since 1987.

Pop superstar Lady Gaga is visiting India to perform at a Formula One after-party and wearing a giant beehive hairdo modeled on the country's flag.

At a news conference Friday, the famously eccentric singer was perched on a large purple and silver couch and sported the hairstyle in the white, orange and green of the Indian flag.

Manchester City reduced its fine of four weeks' wages handed out to Carlos Tevez to just two weeks' pay on Thursday after England's footballers' union backed the player in his dispute with the Premier League club.

City planned to fine Tevez four weeks' salary, which equates to around 800,000 pounds ($1.3 million), after finding him guilty of misconduct over a touchline dispute during a 2-0 loss at Bayern Munich last month.