Question: During his tenure as Ambassador to Vietnam, Donal Read Heath advocated and carried out American policy under a United States Secretary of State for what president?   

full_context: Document 1: John Foster Dulles: John Foster Dulles ( ; February 25, 1888May 24, 1959) served as United States Secretary of State under Republican President Dwight D. Eisenhower from 1953 to 1959. He was a significant figure in the early Cold War era, advocating an aggressive stance against Communism throughout the world.
Document 2: Cable 243: DEPTEL 243, also known as Telegram 243, the August 24 cable or most commonly Cable 243, was a high-profile message sent on August 24, 1963, by the United States Department of State to Henry Cabot Lodge, Jr., the US ambassador to South Vietnam. The cable came in the wake of the midnight raids on August 21 by the regime of Ngo Dinh Diem against Buddhist pagodas across the country, in which hundreds were believed to have been killed. The raids were orchestrated by Diem's brother Ngô Đình Nhu and precipitated a change in US policy. The cable declared that Washington would no longer tolerate Nhu remaining in a position of power and ordered Lodge to pressure Diem to remove his brother. It said that if Diem refused, the Americans would explore the possibility for alternative leadership in South Vietnam. In effect, the cable authorized Lodge to give the green light to Army of the Republic of Vietnam (ARVN) officers to launch a coup against Diem if he did not willingly remove Nhu from power. The cable marked a turning point in US-Diem relations and was described in the Pentagon Papers as "controversial". Historian John W. Newman described it as "the single most controversial cable of the Vietnam War".
Document 3: Donald R. Heath: Donald Read Heath (August 12, 1894 – October 15, 1981) was a member of the United States Foreign Service for more than four decades including service as the Ambassador to Cambodia (1950–1954), Laos (1950–1954), Vietnam (1952–1955), Lebanon (1955–1957) and Saudi Arabia (1958–1961). During his tenure as Ambassador to Vietnam, Heath advocated and carried out American policy under Secretary of State John Foster Dulles that helped set the stage for American military involvement.
Document 4: Nils Daulaire: Nils Daulaire (born 1948) is an American physician and the former Assistant Secretary for Global Affairs at the United States Department of Health and Human Services (HHS). Daulaire has been at HHS since 2010, and became Assistant Secretary in December 2012. He also served as the U.S. Representative on the World Health Organization’s (WHO) Executive Board, a post he was nominated to by President Barack Obama.
Document 5: Joseph McCarthy: Joseph Raymond McCarthy (November 14, 1908 – May 2, 1957) was an American politician who served as U.S. Senator from the state of Wisconsin from 1947 until his death in 1957. Beginning in 1950, McCarthy became the most visible public face of a period in the United States in which Cold War tensions fueled fears of widespread Communist subversion. He is known for alleging that numerous Communists and Soviet spies and sympathizers had infiltrated the United States federal government, universities, film industry, and elsewhere. Ultimately, the smear tactics he used led him to be censured by the U.S. Senate. The term "McCarthyism", coined in 1950 in reference to McCarthy's practices, was soon applied to similar anti-communist activities. Today, the term is used in reference to what are considered demagogic, reckless, and unsubstantiated accusations, as well as public attacks on the character or patriotism of political opponents.
Document 6: Darryl N. Johnson: Darryl Norman Johnson (born 1938) is a retired American politician and career Foreign Service Officer who held many positions in American government around the world. Most recently and importantly he was the United States Ambassador to Thailand from 2001–2004. Additionally, he was acting US Ambassador to the Philippines for several months in 2005. He now lives near Seattle, WA. In retirement he was a lecturer at his undergraduate alma mater, the University of Washington, where he taught in its Jackson School of International Studies.
Document 7: Thomas S. Gates Jr.: Thomas Sovereign Gates Jr. (April 10, 1906March 25, 1983) was United States Secretary of Defense from 1959 to 1961 under President Eisenhower. He was promoted from deputy secretary of defense. During his tenure, he established a task force to set nuclear target priorities. He also authorized U-2 reconnaissance flights, including the flight of Francis Gary Powers.
Document 8: American Community School in Saigon: The American Community School in Saigon was created in 1954, providing American style schooling for the dependent children of Americans working for U.S. government organizations in Saigon, South Vietnam (now a part of Ho Chi Minh City of the Socialist Republic of Vietnam). Some of those organizations included the U.S. Embassy, the U.S. aid mission (USOM), the U.S. Information Service (USIS), and the Military Assistance Advisory Group (MAAG). The school also accepted for enrollment the dependent children of private American firms operating in Saigon, as well as some non-U.S. diplomatic families. Some Vietnamese children also attended the school. The school grew rapidly as U.S. involvement in the Vietnam War escalated, but was permanently closed in February 1965 when all dependents of U.S. government personnel were ordered out of Vietnam by President Lyndon Johnson.
Document 9: Dean Rusk: 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.
Document 10: Robert McNamara: Robert Strange McNamara (June 9, 1916 – July 6, 2009) was an American business executive and the eighth Secretary of Defense, serving from 1961 to 1968 under Presidents John F. Kennedy and Lyndon B. Johnson. He played a major role in escalating the United States involvement in the Vietnam War. McNamara was responsible for the institution of systems analysis in public policy, which developed into the discipline known today as policy analysis.
Document 11: Dwight D. Eisenhower: Dwight David "Ike" Eisenhower ( ; October 14, 1890 – March 28, 1969) was an American politician and Army general who served as the 34th President of the United States from 1953 until 1961. During World War II, he was a five-star general in the United States Army and served as Supreme Commander of the Allied Expeditionary Forces in Europe. He was responsible for planning and supervising the invasion of North Africa in Operation Torch in 1942–43 and the successful invasion of France and Germany in 1944–45 from the Western Front.
Document 12: Thomas C. Mann: Thomas Clifton Mann (November 11, 1912 – January 23, 1999) was an American diplomat who specialized in Latin American affairs. He entered the U.S. Department of State in 1942 and quickly rose through the ranks to become an influential establishment figure. He worked to influence the internal affairs of numerous Latin American nations, typically focusing on economic and political influence rather than direct military intervention. After Lyndon B. Johnson became President in 1963, Mann received a double appointment and was recognized as the U.S. authority on Latin America. In March 1964, Mann outlined a policy of supporting regime change and promoting the economic interests of U.S. businesses. This policy, which moved away from the political centrism of Kennedy's Alliance for Progress, has been called the Mann Doctrine. Mann left the State Department in 1966 and became a spokesperson for the Automobile Manufacturer's Association.
Document 13: NSC-68: National Security Council Report 68 (NSC-68) was a 58-page top secret policy paper by the United States National Security Council presented to President Harry S. Truman on April 14, 1950. It was one of the most important statements of American policy that launched the Cold War. In the words of scholar Ernest R. May, NSC-68 "provided the blueprint for the militarization of the Cold War from 1950 to the collapse of the Soviet Union at the beginning of the 1990s." NSC-68 and its subsequent amplifications advocated a large expansion in the military budget of the United States, the development of a hydrogen bomb, and increased military aid to allies of the United States. It made the containment of global Communist expansion a high priority. NSC-68 rejected the alternative policies of friendly détente and rollback against the Soviet Union.
Document 14: John F. Kennedy: John Fitzgerald "Jack" Kennedy (May 29, 1917 – November 22, 1963), commonly referred to by his initials JFK, was an American statesman who served as the 35th President of the United States from January 1961 until his assassination in November 1963. Kennedy served at the height of the Cold War, and much of his presidency focused on managing relations with the Soviet Union. He was a member of the Democratic Party who represented Massachusetts in the United States House of Representatives and the United States Senate prior to becoming president.
Document 15: Cold War (1947–1953): The Cold War (1947–1953) is the period within the Cold War from the Truman Doctrine in 1947 to the conclusion of the Korean War in 1953. The Cold War began almost immediately following World War II and lasted through most of the 20th century. Political relations between the USA, Britain, Canada and the USSR were tainted within days of VJ-Day when cipher clerk Igor Gouzenko defected from the Soviet embassy in the Canadian capital, offering documentary proof of two wartime networks of Soviet spies in North America, one aimed at the Manhattan Project. In the next five years spies Julius and Ethel Rosenberg and Klaus Fuchs were exposed and British diplomats Guy Burgess and Donald Maclean defected to the Soviet Union.
ground_truth: Dwight D. Eisenhower