** FILE ** German industrial giant Siemens' then chairman of the board Heinrich von Pierer is seen in this file picture taken in Munich on April 28, 2004. 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/Jan Pitman)