Pavel Felgenhauer, an independent defense analyst in Moscow, is pessimistic about a Russia-U.S. rapprochement in part because of enduring concerns about U.S. missile defense system plans.

Yvo de Boer, who heads the UN Framework Convention on Climate Change, says global economic woes are a setback for climate change policy but new U.S. leadership is a "huge signal of encouragement to t…

William Chandler, senior policy analyst for energy and climate at the Carnegie Endowment for International Peace, says that emissions-trading programs have achieved mixed results and should be readju…

G20 members meeting in Mexico won a commitment on banking sector integration despite limited influence on eurozone politics, says expert Jacob Funk Kirkegaard.

This weekend’s G8 summit will be dominated by negotiations over the eurozone sovereign debt crisis and limiting contagion to the global economy, says expert C. Randall Henning.