Question: Before being the United States Secretary of State who did Dean Rusk send official diplomatic correspondence too?

Related documents: [0]  [DOC] The Rusk documents (also known as the Rusk–Yang correspondence) are the official diplomatic correspondence sent by Dean Rusk, the United States Assistant Secretary of State for Far Eastern Affairs, to Yang You Chan (양유찬, 梁裕燦), the South Korean ambassador to the U.S at the August 10, 1951. [END] 
[1]  [DOC] David Dean Rusk (February 9, 1909December 20, 1994) was the United States Secretary of State from 1961 to 1969 under presidents John F. Kennedy and Lyndon B. Johnson. Rusk is one of the longest serving U.S. Secretaries of State, behind only Cordell Hull. [END]  
Answer: Yang You Chan
Yang You Chan