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Last winter, a scientist at Los Alamos National Laboratory began a Web log, or blog, for employees to post concerns and complaints about fixing problems at the government nuclear facility. But now, some members of Congress who've seen the blog see it as a reason to shut Los Alamos down.

Time is running out to save the endangered northern right whale. But researchers continue to comb the seas in search of the elusive mammal, hoping to find a way to prevent its extinction.

In the Miami Cuban community, news of the arrest of Cuban exile Luis Posada Cariles has many people upset. Fidel Castro has asked the U.S. to extradite the Cuban exile, and former CIA operative, for his alleged role in a deadly airplane bombing. It's not clear why or where the U.S. is holding him.

Michele Norris talks with Professor Jack Pitney about the campaign promises made by Los Angeles mayor-elect Antonio Villaraigosa, and the challenges he will face trying to fulfill them when he takes office. Pitney is a professor of government at Claremont-McKenna College in California and is the author of The Art of Political Warfare.

Melissa Block talks with Professor Sarah Binder about the history and tactics of Senate filibusters. Binder teaches political science at George Washington University and is co-author of Politics or Principle: Filibustering in the United States Senate.

The word filibuster goes back to a Dutch word for "freebooter," someone who took booty or loot. It came to mean a legislator who was "pirating" parliamentary proceedings.

This week Newsweek Magazine retracted a report saying a copy of the Quran had been flushed down a toilet during a prisoner interrogation at Guantanamo Bay, Cuba. The protests that followed the report were a sign of the power of the communications revolution that has taken place in the Islamic world.

As U.S. officials announce they've held secret talks with North Korean officials, the world continues to work toward defusing the North Korean nuclear threat. But China shows few signs of stepping up economic sanctions on Pyongyang, fearing sanctions could send a wave of refugees across its border.

Hundreds of thousands of pilgrims who flooded into the Italian capital to watch the funeral of Pope John Paul II were unable to squeeze into St. Peter's Square. Many went to ancient Rome's Circus Maximus instead, watching the ceremony on giant TV screens.

The Central America Free Trade Agreement is as controversial in other countries as it has in the United States. For Honduras and other relatively poor countries, the consequences of free trade with the world's largest economy could be enormous.