Opera singers Juha Uusitalo (R) as Der Wanderer and Tomasz Konieczny as Alberich perform during a dress rehearsal of Richard Wagner's opera "Siegfried" in Vienna's State Opera April 22, 2008. The opera is directed by German Sven-Eric Bechtolf and will have its premiere on April 27, 2008. REUTERS/Herbert Neubauer (AUSTRIA)