World leaders attended a global climate summit virtually on Earth day. How will it impact global progress on tackling climate change?

Tensions between Russia and the U.S. have been escalating after recent sanctions and diplomatic expulsions. Is the chill heading for the deep freeze?

Recently, the Christian Democratic Union of Germany and the Green Party have announced their candidates for chancellor. Why did they stand out in the leadership election?

For this edition of Dialogue Weekend show, we have Wu Changhua, Executive Director of the Professional Association for China's Environment; Josef Gregory Mahoney, Professor of Politics at East China Normal University; Pavel Felgenhauer, Russian Defense Analyst; and Paul Hockenos, German Journalist and Author.