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The deadly conflict in Darfur has deep roots in a vast, arid and long-neglected region in Sudan's west, where battles over water and grazing rights stretch back generations. Scarce resources exacerbate ethnic tensions between black African tribes and Arab-speaking pastoralists and fuel the fighting.

They know what the winds can do. They forecast them. Fight the fires the winds fan. Prepare for evacuations that, in years past, never came. They thought they knew, until seven days of fury began a week ago. "

As firefighters get a little help from the weather, some residents are now returning to their evacuated neighborhoods. For some the news is bad, but most are finding their homes intact. Reporter Tamar

Admired for its green living, Japan has trouble meeting its limits for carbon dioxide emissions. Lifestyle changes and industry emissions contribute to the rising CO2 levels.

The Nobel Prize for economics has been awarded to three Americans. Leonid Hurwicz, Eric S. Maskin and Roger B. Myerson are credited with developing a theory that helps explain how sellers and buyers can maximize their gains from a transaction.

Turkey's top general insists that U.S.-Turkish military ties will never be the same if Congress adopts a resolution labeling as "genocide" the killings of Armenians in Ottoman Turkey. Seventy percent of supplies for U.S. troops in Iraq go through Turkey.

Several researchers at UCSD's Scripps Institution of Oceanography are part of the panel sharing the Nobel Peace Prize with Al Gore. 2,000 scientists worked on climate change research for the United Na

Now that former Vice President Al Gore has won the Nobel Peace Prize, what are the political pressures on him to run for the White House in 2008? And what are the reasons that he wouldn't?

Now that he has been awarded the Nobel Peace Prize, Al Gore joins an elite club that includes presidents, activists and holy men. It is also a club that seems cursed. Past winners have fallen into ill repute, been assassinated — and faded from public view.

Mitt Romney and Rudy Giuliani have been sparring all week about who's tougher on taxes and spending. Independent observers say both men are pretty tough, even if their records are not quite as pure as their campaign boasts would suggest.