Question: Dark Side of the Moon is a French mockumentary featuring a guest appearance by  an American retired politician and businessman who served as the 21st Secretary of Defense under who?
Sentence (from "Donald Rumsfeld"): Additionally, Rumsfeld was a three-term U.S. Congressman from Illinois (1963–1969), Director of the Office of Economic Opportunity (1969–1970), Counsellor to the President (1969–1973), the United States Permanent Representative to NATO (1973–1974), and White House Chief of Staff (1974–1975).
Relevant evidence: No