Christian Science Monitor: Delegates from more than 190 countries today opened what some are calling a historic round of talks on climate change in Copenhagen. But the final chapters remain to be written. Not since the 1997 negotiations in Kyoto, Japan have talks on global warming attracted such high-level political involvement. Leaders from some 110 countries, including President Obama, are slated to appear at the end of the conference to help give the meeting a push toward what lead US negotiator Jonathan Pershing calls "a comprehensive, operational Copenhagen accord."