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Drugs being developed to aid Alzheimer's disease sufferers promise improved memory function. But the drugs are also reported to aid the memory of healthy people. An article in the journal Neurology suggests that we may be entering an era of cosmetic neurology, when a "brain-lift" is possible. NPR's Jon Hamilton reports.

Federal officials report that the painkiller Naproxen may increase the risk of heart attacks and strokes, just after similar news about Pfizer's Celebrex. The drug is best known as the main ingredient in Aleve, an over-the-counter pain reliever. NPR's Richard Knox reports.

While Sept. 11 commission co-chairman Thomas Kean considers the panel's report definitive, he concedes many details remain cloudy. Some groups say more investigation is needed to answer critical questions. NPR's Larry Abramson reports.

The Washington Post runs a major report detailing new information that indicates the Bush administration lacked evidence to support its pre-war claim that Iraq's nuclear threat was imminent. Hear NPR's Renee Montagne and Post reporter Barton Gellman.

The World Health Organization removes the United States and the United Kingdom from the list of areas significantly affected by SARS. Health officials are treating with caution news of 12 possible relapses reported in Hong Kong. NPR's Joanne Silberner reports.

Iraqi television broadcasts footage of what it claims is President Saddam Hussein visiting residential areas of Baghdad on Friday. If the video is authentic, it would be Saddam's first public appearance in two years. Meanwhile, Iraqi ministers continue to report the battle is going according to Iraqi plans. NPR's Anne Garrels reports.

U.S. ground forces set the stage for an assault on Baghdad. The Army's 3rd Infantry Division is reported to be about 30 miles southwest of the Iraqi capital. Southeast of Baghdad, U.S. Marines destroy a division of the Iraqi Republican Guard and cross the Tigris River. NPR's Mike Shuster reports.

A group of very patient astronomers reports new evidence that an immense black hole lives at the center of Earth's galaxy. The team has been watching a handful of stars at the center of the Milky Way for a decade -- waiting for a telltale sign that they're in orbit around a black hole. NPR's David Kestenbaum reports.

In the first of three reports on how local, state and federal governments are dealing with post-Sept. 11 security, NPR's Pam Fessler reports on how some of the federal government's anti-terrorism efforts are working in Florida -- the home of many potential targets, and also a state that has one of the nation's more ambitious homeland defense programs.

Wall Street Journal reporters Rebecca Smith and John Emshwiller tell how they tracked the collapse of energy giant Enron in their new book 24 Days. The reporters helped unravel one of the biggest white-collar crime stories ever. Hear Smith, Emshwiller and NPR's Renee Montagne.