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Iranian government officials from the president on down emphasized that they will not give up the right to enrich uranium and they insist the United States and Europe are falsely accusing Iran of seeking nuclear weapons. Linda Wertheimer talks to Mike Shuster.

David Bransby, professor of energy crops at Auburn University, is an expert on switch grass, which President Bush mentioned in his State of the Union address. Bransby says switch grass is cheap to grow and provides a high yield crop that can make a lot of ethanol for a low cost.

The New York Times columnist says the stroke forced him to choose: He could focus on what had been lost, or on what remained. His memoir is The Beauty of Dusk. Originally broadcast March 22, 2022.

Journalist Nicholas Kristof has just won the Pulitzer prize for his New York Times commentary on Darfur. He and John Prendergast of the International Crisis Group deliver an update on the continuing crisis and genocide still under way in the African republic of Sudan.

Commentator Julie Zickefoose is a rural birdwatcher. One of the signature sounds of spring's arrival is the song of the brown thrasher. If you listen closely, the bird seems to be sending out orders. Julie Zickefoose listens and obeys.

Republicans and Democrats on Capitol Hill are expressing reservations about the prospect of Gen. Michael Hayden heading the CIA. Several members of Congress say the CIA should be led by a civilian.

Artists Jeanne-Claude and Christo, who last winter exhibited The Gates of Central Park, are now focused on their next installation, Over the River. In development off and on since 1992, the project will festoon the Arkansas River with swaths of fabric, a rural and much larger version of last year's New York feat.

Americans spend $2 billion per year on organic milk. For milk to be labeled organic, the USDA says that cows must be raised on pesticide-free feed, without hormones. As organic mega-dairies sprout up, small-dairy farmers say some so-called "organic" cows don't get enough meadow time.

Members of Congress hope to block a deal that would place control of several U.S. ports in foreign hands. Dubai Ports World has agreed to buy a company that operates six major seaports. Federal officials insist the purchase does not pose a security risk.

The United Nations says Iran has ignored the Security Council's call to suspend all nuclear fuel enrichment. Instead, the U.N. says Iran has accelerated its program. Bush administration officials say it is now time for the Security Council to act against Iran.