COPENHAGEN – A diplomatic frenzy enveloped the final scheduled day of the U.N. climate conference Friday, with President Barack Obama meeting with China's premier as world leaders pressed to salvage a global warming accord amid deep divisions between rich and poor nations. But neither Obama nor Chinese Premier Wen Jiabao offered any new commitments to cut the greenhouse gas emissions that cause global warming as they addressed the conference. And Wen skipped a high-level meeting of major nations, sending an envoy instead. "We are ready to get this done today but there has to be movement on all sides to...