Dr. James Rodney Schlesinger (born February 15, 1929) is an American public servant. He is best known for serving as Secretary of Defense from 1973 to 1975 under Presidents Richard Nixon and Gerald Ford. He became America's first Secretary of Energy under Jimmy Carter. While Secretary of Defense, he opposed amnesty for draft resisters, and pressed for development of more sophisticated nuclear weapon systems. Additionally, his support for the A-10 and the lightweight fighter program (later the F-16) helped ensure that they were carried to completion.