Profile: Birgit Steinborn, Head of Siemens Works Council

According to the daily Frankfurter Allgemeine Zeitung, Birgit Steinborn is Germany's most powerful female executive. She heads up the works council at Siemens, and was recently appointed deputy chairwoman of its supervisory board. Who is Birgit Steinborn? How did she become such a high-flier? And how does she feel about the company's plans to slash jobs?