In her review of Anne Nelsonâ??s â??Red Orchestraâ? (June 7), Dagmar Herzog chose Libertas Schulze-Boysen to represent members of the German resistance executed by the Nazis. Another victim of interest to American readers was her comrade Mildred Fish Harnack, who was also beheaded in Berlinâ??s Plötzensee prison. She was a University of Wisconsin graduate who taught literature in Germany after marrying Arvid Harnack (also executed) and was the only United States citizen executed on Hitlerâ??s personal orders. A school in former East Berlin is named for her.