Hormone shots that are a popular form of birth control in Africa may increase the risk of HIV infection for women who use them and the men who are their sexual partners.

President Obama has waded into the controversy over bank card fees, suggesting that Bank of America is mistreating its customers with a plan to start charging a $5 monthly fee for the use of its debit card.

In an interview Monday with ABC, the president seemed to suggest the fee could become a target for the federal government's new financial watchdog agency.

"This is exactly why we need this Consumer [Financial] Protection Bureau that we set up, that is ready to go," he said.

For years, it was common to see images of Chinese people riding bikes in massive packs, coursing along the streets of Beijing or other sprawling metropolises. Then, as the nation's economy took off, bicycles came to be seen as part of the country's past — and cars as a sign of its future.

Greek Prime Minster George Papandreou, who was born and raised in the U.S., belongs to Greece's most important political dynasty — he's the son and grandson of prime ministers.

And yet just two years after he led the Socialist party to victory, his popularity has plummeted, his debt-stricken country is at the heart of the eurozone crisis and he faces the daunting task of dismantling the generous welfare state his father created.

You think your job is tough? Some scientists examined sewage from Pittsburgh, Barcelona and Addis Ababa in a hunt for unknown viruses.

They found scads. How many? At least 43,381.

To put that number into perspective, consider that up to now scientists have charted only about 3,000 viruses. And among the known viruses found in the sewage samples, only 17 were bugs that cause human disease — things like the common cold virus, diarrhea-causing Norwalk virus and human papilloma virus, or HPV, which causes cervical cancer and genital warts.

Today was widely expected to bring the announcement of the iPhone 5 — maybe with a bigger screen, a different home button, or a differently shaped case — at Apple's headquarters in Cupertino, California.

It didn't.

That's not to say Apple didn't say anything of note at its rather lengthy presentation. Not at all. But the big game-changing piece of new hardware didn't come to pass. Aficionados waited, wondering and chattering on liveblogs and on Twitter to see if it would come at the end in Apple's traditional "one more thing" fashion.

It didn't.

With the Dow Jones industrial average and other market indexes around 20 percent below their recent peaks, the very definition of a "bear market," there's understandably a fair amount of concern among investors and everyone else who watches the economic indicators.

Apple Inc. has unveiled the company's updated version of the iPhone 4, called the iPhone 4S. The phone, which will be launched on Oct. 14, is very similar to the iPhone 4's styling. But it features all-new hardware inside, according to Apple.

With an improved battery and software, the phone allows six hours of browsing on a 3G network, and nine hours of Wi-Fi browsing, according to Apple. And the phone also has an 8 megapixel camera with an improved sensor. The camera will reportedly allow for HD video recording in 1080p resolution, with image stabilization.

Last year Americans hit the road 112 million times after drinking too much.

That statistic, just released by the Centers for Disease Control and Prevention, is nothing to be proud about. But it's worth noting that the number of alcohol-impaired driving episodes has declined 30 percent since peaking at 161 million in 2006.

Some 4 million adults in the U.S. drove while impaired by alcohol last year, the CDC estimates. That works out to about 479 episodes for every 1,000 adults.

"Now is not my time," New Jersey Gov. Chris Christie just said at a news conference in Trenton — ruling out a run for the 2012 Republican presidential nomination.

"New Jersey, whether you like it or not, you're stuck with me," Christie added.

Update at 1:10 p.m. ET. More From Christie:

The governor said he did consider making a bid. He had been asked to run by many people, Christie said, and "felt an obligation to earnestly consider their advice."