Agence France-Presse: A marathon conference on how to fight global warming in the next decade was poised for a breakthrough, with the United States showing flexibility, the UN climate chief said late Friday. The 190-nation talks on the Indonesian island of Bali headed deep into overtime after the United States and European Union feuded over the framework for accelerating the fight against climate change beyond 2012. But the atmosphere brightened in the last scheduled hours of the 12-day …