Associated Press: Nobel Peace Prize winner Al Gore on Wednesday accused the U.S. of blocking progress at U.N. climate talks in Bali but said a breakthrough was possible in the final days of the conference. "Some of the reports are worrisome, but I know from experience … that when breakthroughs do occur, they usually happen in the last 48 hours," Gore told reporters in Sweden. "I hope there will be a change on the part of some countries, including most importantly my own, the United …