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In Genius Factory, author and Slate columnist David Plotz traces the history of a so-called "Nobel Prize" sperm bank. Plotz tells Jennifer Ludden of his quest to find the bank's "genius" donors — most weren't what they were represented to be — and their offspring.

Scientists say they've developed a SARS vaccine that can be ingested. The new plan involves modifying tomatoes (and tobacco) so that an inactive form of the SARS virus grows in the plant. When mice ate the tomatoes, they were protected against SARS.

As the trial of Edgar Ray Killen begins, commentator Walter Cronkite recalls the story of the slaying of three civil rights workers in 1964. Cronkite saw the drama unfold amid two struggles: one for civil rights and another against the Vietnam War.

Roughly 8 percent of the 741,000 Mexicans caught entering the United States each year give up trying to enter, according to a new study. Wayne Cornelius, the director of the UC San Diego Center for Comparative Immigration Studies, discusses the study by the Pew Hispanic Center on unauthorized migrants in the United States.

NARAL Pro-Choice America is withdrawing its TV ad that harshly criticized Supreme Court nominee John Roberts. Even fellow abortion-rights allies complained the ad was unfair.

What are the legal ramifications of racial and religious profiling to combat terrorism? Scott Simon asks two experts. Richard Jerome oversaw the civil rights division -- and police accountability -- while at the Justice Dept. Paul Rosenzweig, a former federal prosecutor, is a senior research fellow at the Heritage Foundation.

The Fire Department of New York releases oral histories and audio from Sept. 11, 2001. Crowded radio frequencies may explain in part why firefighters stayed in the north tower of the World Trade Center 29 minutes after the south tower fell.

After decades of urban decay, Baltimore is experiencing a real-estate boom, with investors pouring money into abandoned properties. But some worry the speculation may lead to a financial meltdown. Others note it has already displaced some poor residents.

The cost of rebuilding the Gulf Coast after the hurricane could top $200 billion -- roughly the same cost of the Iraq war. But President Bush says the money to pay for it should come from spending cuts, not new taxes.

The mayor of New Orleans is suspending his plan to bring Hurricane Katrina evacuees back home. Instead, Mayor Ray Nagin is ordering a new evacuation because tropical storm Rita may pose a new risk for the embattled city.