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Commentator Jeff Steinbrink talks about the new miniature camera that transmits pictures of the digestive tract. The camera is swallowed in a capsule and offers views of the human digestive system never before seen.

Commentator Diana Nyad says she's not a fan of the way the U.S. selects its Olympic athletes.

NPR's Guy Raz reports on how college professors are adapting their teaching methods to an Internet world. With course notes on-line and some professors even replacing themselves with CD-ROMs, the changes have been tougher on the teachers than the students.

Host Renee Montagne talks to reporter Steven Dudley in Bogota about the latest surge in violence in Colombia. Over the week-end, suspected members of Colombia's right-wing paramilitary forces killed at least 17 people in two separate massacres.

Jeff Brady of member station KOPB examines the changing roll of county fairs. As more and more ranchers and farmers turn to the Internet to purchase their supplies, fairs have shifted more toward education and entertainment to stay in business.

NPR's Elaine Korry reports on the record high prices for natural gas and how they're expected to raise heating bills this winter. Supplies of natural gas are the tightest they've been in years. High natural gas prices also drive electricity bills higher, in states such as California, where natural gas is used to generate electricity during periods of peak demand.

Host Renee Montagne talks to Canadian reporter Hillary MacKenzie and Japanese reporter Yoichi Kato about the way they're covering the U.S. Presidential campaign. MacKenzie is Washington bureau chief for Southam News, Canada's largest news organization. Kato is political correspondent with the Japanese newspaper, Asahi Shimbun.

Host Renee Montagne talks to commentator John Feinstein about this year's U.S. Open tennis tournament, which begins today in New York.

NPR's Jim Zarroli reports that today, the New York Stock Exchange begins changing the way it lists the price of stocks. A few selected stocks will be shown in dollars and cents, rather than dollars and fractions. The exchange plans to have all share prices listed in dollars and cents by April.

NPR's Andy Bowers reports from Idaho on the start of a trial that could handicap the Aryan Nation. Two years ago, members attacked a woman and her son as they drove past the entrance to the hate group's compound. The Southern Poverty Law Center is trying to tie the actions of the groups' followers to their leader, Richard Butler.