Donald Phinney Gregg (born December 5, 1927) is a retired American politician, CIA employee, and U.S. Ambassador to South Korea. Gregg worked for the Central Intelligence Agency for 31 years, from 1951 to 1982. He was a National Security Council advisor (1979–1982) and National Security Advisor to U.S. Vice President George H. W. Bush (1982–1989), United States Ambassador to Korea (1989–1993), and the chairman of the board of The Korea Society (until 2009), where he called for greater engagement with North Korea. Wikipedia
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