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Australians Robin Warren and Barry Marshall receive the 2005 Nobel Prize in Physiology or Medicine. Their research bucked conventional wisdom, showing that a bacterium, not simply excess stomach acid, causes peptic ulcers. Also, it suggested that bacterium may be a major cause of stomach cancer.

Iraqi authorities are investigating an apparent attempt to burn down the headquarters of the Iraqi Transitional Government, situated in the heavily guarded Green Zone. Earlier this week, Prime Minister Jaafari announced a new national security plan.

Sixty years ago Saturday, the B-29 bomber Enola Gay loosed a 10,000-pound atomic bomb over the Japanese city of Hiroshima. We remember Aug. 6, 1945, and the people whose lives were changed by it.

South Korean scientists announced Wednesday they have created the first cloned dog. Snuppy, an Afghan hound, was born in April. The cloning technique used is not efficient. It took nearly 2,000 eggs to make some 1,000 embryos -- all of which produced just one healthy puppy.

Gen. William Westmoreland, who commanded American forces in Vietnam from 1964 to 1968, died Monday night in Charleston, S.C. He was 91. Pulitzer Prize-winning author Stanley Karnow talks about Westmoreland and his insistence that the United States "did not fulfill its commitment to South Vietnam."

Judith Miller, a Pulitzer Prize-winning reporter for The New York Times, was sentenced to jail Wednesday after she refused to identify a confidential source who leaked the name of CIA agent, Valerie Plame. Time magazine's Matthew Cooper was also slated to go to jail for refusing to name his source, but at the last minute, his source offered him a reprieve.

The West African nation of Mali is one of the impoverished countries that could benefit from the debt relief proposed by British Prime Minister Tony Blair. Economic development has been slow in Mali, but with debt forgiveness its potential for growth is rife.

New York Times reporter Judith Miller is jailed for refusing to testify before a grand jury about her sources in the story of a CIA leak. Miller never wrote about the case. Time magazine's Matthew Cooper has agreed to testify with the blessing of his source.

Journalist George Weller was in Nagasaki shortly after the Japanese city was hit by an atomic bomb in 1945. He wrote newspaper stories on what he saw, but military censors prevented their publication. The writer's son recently found carbon copies of the originals.

As the price of oil continues to climb, the scramble for new sources of the fossil fuel continues. One of the more promising places is Libya. In the past year, the United States allowed American businesses to return to Libya -- a decision that appears to be mutually beneficial.