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Americans Andrew Z. Fire and Craig C. Mello win the Nobel Prize in Physiology or Medicine for discovering "RNA interference," a way organisms turn off individual genes. The discovery is considered by many scientists to be a breakthrough in modern biology.

The new detainee-rights legislation passed by the Senate gives the President new authority in dealing with detainees suspected in the war on terrorism.

President Bush defended his diplomatic strategy with North Korea at a news conference Wednesday, saying bilateral talks with the nation during the Clinton administration just didn't work to curb its nuclear ambitions.

A major in the Army Reserves and financial counselor with the Army allegedly used his access to beneficiaries of deceased servicemembers to defraud them and enrich himself, prosecutors allege.

As the Mideast crisis continues to intensify, the head of Lebanon's militant group Hezbollah declares "open war," and Israel says it will not stop its military campaign until Hezbollah is disarmed.

An unexpectedly steep rise in tax revenues has driven down the projected federal budget deficit this year. The White House says that the deficit will be about $296 billion, much less than the $423 billion predicted six months ago. Steve Inskeep talks with David Wessel of the The Wall Street Journal.

The U.S. offensive against Iraqi insurgents in Fallujah continues, as the insurgency launches attacks elsewhere in the country. U.S. commanders say they control 80 percent of the city, and troops are pushing southward through the city amid frequent firefights. NPR's Anne Garrels reports.

U.S. officials maintained Friday that Ukraine has provided written assurances to minimize civilian casualties with the use of the controversial munitions.

Seven Marines and one sailor have been charged with murder in connection with the April death of an Iraqi civilian, the Marine Corps says. The case revolves around the search for a suspected insurgent on April 26. Investigators say the U.S. group killed an innocent man and portrayed him as an insurgent.

A U.S. military strike has killed the most feared terrorist in Iraq, Abu Musab al-Zarqawi. The Jordanian-born Zarqawi was killed when U.S. warplanes dropped 500-pound bombs on his hiding place. Pentagon officials say they found a treasure trove of material at the safehouse.