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Two Americans and a German share the prize for work that used light to make some of the most precise measurements ever performed. Engineers have used the observations of Roy Glauber, John Hall and Theodor Haensch to improve lasers, Global Positioning System technology and other instruments.

A new study shows that regular use of aspirin and painkillers such as ibuprofen is highly effective at preventing colon cancer in women. Even so, experts say people shouldn't take painkillers to prevent cancer -- only high doses proved effective.

At 18, Yundi Li became the youngest person ever to win the prestigious International Chopin Competition. The pianist, now 22, discusses his enthusiasm for the 19th-century Polish composer.

A U.S. military judge in Baghdad rejects pre-trial motions requesting that the trials of two American soldiers accused of abusing Iraqi prisoners at Abu Ghraib be held outside Iraq. Judge Col. James Pohl also denies defense requests for memos by Bush administration lawyers on the use of interrogation tactics. Defense lawyers argue their clients were following orders that originated higher up the chain of command. Hear NPR's Emily Harris.

U.N. Secretary-General Kofi Annan says new rises in AIDS infection rates prove that the world has not done enough to combat the disease. Annan, speaking at the 15th International AIDS conference, challenged leaders to stop the spread of AIDS. Hear NPR's Richard Knox.

Savage was dropped as executive producer and director of the rebooted series after an investigation into allegations of inappropriate conduct, the show's production company said.

Sharon Osbourne, who revealed the diagnosis, said she is taking off time from work to care for her 73-year-old husband, a rock music legend. "I am very worried about Ozzy right now," she said.

A northern pintail duck was also killed and three other flamingos were injured, according to the zoo.

Interim Iraqi Prime Minister Iyad Allawi signs into law a measure that gives him broad powers of martial rule to fight the ongoing insurgency. Under the law's provisions, Allawi can declare emergency rule and impose curfews in any part of the country threatened by instability. Hear NPR's Renee Montagne and NPR's Philip Reeves.

Dave Smith, a pioneer of the synthesizer, revolutionized pop music in the 1980s. David Bowie and Madonna are among the legions who used his Prophet 5 synthesizer. Smith died last week at age 72.