** FILE ** The CEO of German industrial giant Siemens, Heinrich von Pierer, leaves a shareholders' meeting in this Nov. 11, 2004 file picture taken in Munich, southern Germany. Siemens said Thursday April 19, 2007 von Pierer was stepping down and would give up his post as chairman of the supervisory board at the next board meeting on April 25. His term would otherwise have run until next year, he said in a company statement. (AP Photo/Diether Endlicher)