When Ronald Reagan proposed the Strategic Defense Initiative (SDI), a system of lasers and missiles meant to intercept incoming ICBMs, the plan was quickly labeled "Star Wars", implying that it was science fiction and linking it to Reagan's acting career. According to Frances FitzGerald, Reagan was annoyed by this, but Assistant Secretary of Defense Richard Perle told colleagues that he "thought the name was not so bad."; "'Why not?' he said. 'It's a good movie. Besides, the good guys won.'" This gained further resonance when Reagan described the Soviet Union as an "evil empire".