Claim: Charles Woodruff Yost was a United States Ambassador to the United Nations for two years.
Evidence: Charles Woodruff Yost -LRB- November 6 , 1907 -- May 21 , 1981 -RRB- was a career U.S. diplomat who was assigned as his country 's representative to the United Nations from 1969 to 1971.
The United States Ambassador to the United Nations is the leader of the U.S. delegation , the U.S. Mission to the United Nations.