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Frustrated by anesthesia machines that conked out when the power faltered, Dr. Paul Fenton came up with a solution: The Universal Anesthesia Machine.

The majority of undocumented workers in the U.S. come from Latin America, but there are still huge numbers from elsewhere in the world. Renee Montagne talks to immigration attorney Muzaffar Chishti.

Sure as the season, some toys that turn up on the most-popular lists are also considered a safety hazard. So best to skip the LED crossbow, eye doctors say.

In France, some say a gastronomic icon is under threat. For the last decade, the number of pre-prepared, frozen croissants sold in bakeries has been increasing. These knock-offs are cheaper, but they're also less delicious.

The crowds that cheered the shuttle on Saturday changed their tune after a night of hassles that left the Endeavour still blocking L.A. traffic and threatening trees early Sunday morning.

Because of fears that lab-altered bird flu viruses could cause a deadly pandemic if they ever escaped the lab, scientists agreed to a moratorium on mutant H5N1 flu research eight months ago. Now top scientists in the field continue the debate about the work, publishing six commentaries for and against the end of the moratorium.

Most Afghans realize that the presence of U.S. and coalition forces has "literally reshaped their country after decades of war and conflict," says Ambassador James Cunningham. Also: A top general says stress of fasting during Ramadan may be factor in "green on blue" attacks.

Nobody imagined that the rings around Saturn might be fed by geysers. But some of the water vapor shot out by one of Saturn's moons actually makes it into orbit around the planet.

An IPO filing provides a window into wealth. In the case of Facebook, the wealth will likely be enormous and spread across hundreds if not thousands of early investors and employees. The number of millionaires and billionaires in Silicon Valley grew noticeably Wednesday.

His confirmation that he pays at a much lower rate than many much less well-off Americans, is likely to reignite a debate over whether the wealthy should be asked to pay a greater share of federal taxes.