The talks are the most intensive yet in an effort to end the strife in Darfur , the vast region of western Sudan that is the site of what the United Nations has called the world 's worst refugee crisis and what the Bush administration calls genocide .
Sudan
Darfur
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Darfur
Sudan
/location/administrative_division/country
Sudan
Darfur
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LOCATION
Darfur
LOCATION
Sudan
ORGANIZATION
United Nations
PERSON
Bush