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The discovery that human body cells can be used as stem cells is creating buzz in the scientific community. Experts say the development will likely transform research; in the political world, some say it will end the debate over the need to use human embryos.

Los Angeles braced for a large turnout for two immigrant rights demonstrations this May Day. The focus on pressuring Congress to adopt broad immigration changes could draw large enough crowds to bring downtown businesses to a halt.

The Federal Reserve's response to the crisis in the housing market was Chairman Ben Bernanke's biggest move since he took office. It comes in a week of publicity about his predecessor Alan Greenspan. But the real pressure stemmed from an economy at risk and the lives of consumers disrupted.

The 15 British sailors and marines Iran captured two weeks ago are home. Britain says it hopes to resolve any future disagreements peacefully.

Fans of Apple computers got word that their favorite company is going into the phone business. Apple CEO Steve Jobs introduced its new iPhone, which combines a mobile phone — including a camera — with a music player. At the Macworld Conference and Expo in San Francisco, Jobs also introduced the Apple TV device.

Sheriffs' detectives in Inyo County, Calif., believe a one-time hideout of the notorious Charles Manson clan may be concealing the bodies of murder victims from nearly 40 years ago. The detectives are converging Tuesday on the Barker Ranch with shovels and high-tech ground-penetrating radar to search for graves.

After weeks of anticipation, Gov. Sarah Palin and Sen. Joe Biden faced off in the one and only Vice Presidential debate last night. Law professor Joel Goldstein, of St. Louis University, and presidential debate expert Alan Schroeder, of Northeastern University discuss the highs and lows of both candidates' debate performance.

Sen. Hillary Clinton has called it quits, 502 days after launching what at the time seemed an unstoppable bid for the presidency. On Saturday, she spoke in Washington, D.C., promising to work her heart out to help Sen. Barack Obama win in November. But not all of her supporters were eager to follow suit.

Sarah Palin was thought to be a pick of potentially high risk and high reward when she was named John McCain's running mate. So far, the reward has been that she has galvanized the base and boosted the campaign's fundraising. But the potential risks of a largely unknown candidate also were on display Monday.

There is no sign of a peaceful resolution to the conflict in Sudan. Millions of Sudanese civilians continue to be displaced as the country teeters on the brink of full-scale civil war.