ABC News -- ABC's Sunlen Miller and Z. Byron Wolf report: President Obama today said that efforts need to be redoubled in order to make progress at the Copenhagen climate change summit next month in December. "And all of us agreed that it was imperative for us to redouble our efforts in the weeks between now and the Copenhagen meeting, to assure that we create a framework for progress in dealing with what is a potential ecologic disaster." The President spoke today at the end of the U.S.-European Union Summit in the Cabinet Room with the Prime Minister of Sweden Fredrik Reinfeldt, President of the European Commission Jos(c) Manuel Barroso, and the European Council High Representative Javier Solana. The leaders emerged from their hour-long meeting...