Rosemary Anne DiCarlo served as acting United States Ambassador to the United Nations following the resignation of an American public servant who was confirmed as UN ambassador by the U.S. Senate by unanimous consent on what date? 
Rosemary DiCarlo: Rosemary Anne DiCarlo (born 1947) is an American diplomat who served as acting United States Ambassador to the United Nations following the resignation of Susan Rice to become the National Security Advisor. Susan Rice: Susan Elizabeth Rice (born November 17, 1964) is an American public servant who served as the 24th United States National Security Advisor from 2013 to 2017. Susan Rice:  She was confirmed as UN ambassador by the U.S. Senate by unanimous consent on January 22, 2009.
January 22, 2009