VIENNA - Iran, the United States and other world powers are all but certain to miss Monday's deadline for negotiations to resolve a 12-year stand-off over Tehran's atomic ambitions, forcing them to seek an extension, sources say. | Video
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FERGUSON, Mo. - After a fourth straight night of low-level protests in Ferguson, Missouri, anxious residents still did not know on Sunday when a grand jury will return a decision on whether to charge a white policeman who shot an unarmed black teen to death this summer. | Video
BUFFALO - Emergency workers filled thousands of sandbags on Sunday as the area around Buffalo, New York braced for potential flooding as warming temperatures began to melt up to seven feet (2 meters) of snow.
FERGUSON Mo - An uneasy quiet settled over Ferguson, Missouri, on Saturday evening after another day without a decision from a grand jury on whether to bring charges against a white police officer for fatally shooting a black teen.
ARBIL, Iraq - Kurdish forces in northern Iraq are drawing up plans to break Islamic State's siege of Sinjar mountain, where hundreds of minority Yazidis remain stranded months after fleeing their homes.