Reuters: U.N.-led climate change talks in Bali finally agreed on Saturday to launch negotiations on a new pact to fight global warming, after a last-minute U.S. reversal allowed a breakthrough. Below is a summary of some of the high and low points of the two-week talks. HIGHLIGHTS DRAMATIC FINAL SESSION A deal was only agreed after a day of high drama and emotional speeches, including several standing ovations, a last-minute plea for compromise by Indonesia’s president …