Johannes Teysseen, CEO of German energy giant E.ON, attends a press conference after a meeting on EU's nuclear safety in Brussels, capital of Belgium, on March 15, 2011. The European Union (EU) would conduct "stress tests" on its member states' nuclear power plants in the wake of Japan's nuclear crisis, the bloc's energy chief Guenther Oettinger said here on Tuesday. [Xinhua/Thierry Monasse]