Associated Press: With global climate change talks at a critical juncture, President Barack Obama is dashing to Copenhagen on Thursday to join more than 110 other world leaders looking to push an interim agreement across the finish line. Obama will be on hand for the final day of the two-week, 193-nation U.N. climate conference. But U.S.-China acrimony, a bitter divide between rich and poor nations and dissatisfaction with the U.S. emissions-reduction pledge clouded prospects for any …