In honor of Mueller’s memory, we turned to our archives. Wernher von Braun quoted Mueller a number of times in his columns for Popular Science, for his expertise in manned space flight. In a January 1964 Popular Science article, von Braun detailed a November 1963 meeting with President John F. Kennedy: In March 1968, von Braun wrote about the success of the Saturn V-Apollo’s flight test using the all-up method for Popular Science: You can read a 1969 article Mueller wrote for the New York Times about the manned lunar landing and his ambitions for the future here, and read his NASA oral history interviews done in 1998 and 1999 here.