Tha National Institute of Social Sciences mourns the passing of former Manhattan District Attorney Robert Morgenthau. Mr. Morgenthau, who served as Manhattan’s D.A. for more than 30 years, died on Sunday, July 21. He was 99. The National Institute had honored Mr. Morgenthau with a Gold Medal for Distinguished Service to Humanity in 2008, and he had served as one of the National Institute’s honorary trustees for many years.