Donald Rumsfeld is a retired American political figure and businessman. Rumsfeld served as Secretary of Defense from 1975 to 1977 under Gerald Ford, and again from 2001 to 2006 under George W. Bush.
He is both the youngest and the second-oldest person to have served as Secretary of Defense. 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).