Feynman speaking from the grave? You decide:
For a successful technology, reality must take precedence over public relations, for nature cannot be fooled.
Richard Feynman, in the Rogers Commission Report on the Space Shuttle Challenger Accident, appendix (1986)
Photo: Richard Feynman, at a hearing of the Rogers Commission, demonstrates with a glass of ice water and a piece of O-ring material, how cold makes the O-rings inflexible; photo credit unknown