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 "Dark Side of the Moon (film)"): It features some surprising guest appearances, most notably by Donald Rumsfeld, Dr. Henry Kissinger, Alexander Haig, Vernon Walters, Buzz Aldrin and Stanley Kubrick's widow, Christiane Kubrick.
Relevant evidence: Yes