Nation

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Defense Secretary Donald Rumsfeld told U.S. troops in Qatar on Monday that the conflict in Iraq marked a turning point in the history of warfare. Margaret Warner examines this change with military experts Lucian Truscott IV, James Dunnigan, Winslow Wheeler,…

U.S. soldiers fired on Iraqis at a demonstration in Fallujah after some crowd members shot at troops, U.S. officers said Tuesday. According to the Red Cross and a local hospital director, troops killed 15 people and wounded some 75 others.

Web logs, or "blogs," are personal, online journals - and one of the fastest growing trends on the Internet. Terence Smith explores the motivation behind blogging and whether blogs represent the future of journalism.

The Recording Industry Association of America sued four students earlier this month, alleging they operated music-sharing Web sites. Terence Smith reports on the entertainment industry's efforts to stop the downloading of copyrighted music and film from the Internet.

During talks with U.S. and Chinese officials in Beijing, a North Korean official reportedly admitted his country has nuclear weapons, and might test, export or even use them if provoked. Jim Lehrer discusses the state of diplomatic play with David…