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A slow shutter speed and change in zoom range causes a streaked effect on this image of delegates and attendees at the Republican National Convention at the Xcel Center in St. Paul, Minn., on Wednesday, Sept. 3, 2008, the third day of the event. (JOE MAHO

A slow shutter speed and change in zoom range causes a streaked effect on this image of delegates and attendees at the Republican National Convention at the Xcel Center in St. Paul, Minn., on Wednesday, Sept. 3, 2008, the third day of the event. (JOE MAHO