Question: What program was Wernher von Braun credited with inventing and did Helmut Gröttrup help in managing? 
Sentence (from "Man Will Conquer Space Soon!"): Edited by Cornelius Ryan, the individual articles were authored by such space notables of the time as Willy Ley, Fred Lawrence Whipple, Dr. Joseph Kaplan, Dr. Heinz Haber, and von Braun.
Relevant evidence: No