Donald Rumsfeld’s quotations

Donald Rumsfeld, who was the US Secretary of Defense in the presidencies of Ford and Bush (jr) has died at the age of 88.

https://www.bbc.com/news/world-us-canada-54889848

Trivia notes: he is the only person to have been the Defense Secretary twice. The first time (1975-77) he was the youngest to hold the post. The second time (2001-06) he was the oldest.

He is remembered for his quotations, notably the one about known knowns and unknown unknowns. The more famous ones can be seen here:

https://www.brainyquote.com/authors/donald-rumsfeld-quotes