Karl Arnstein's life was defined by the world wars which shattered Europe. But for these cataclysmic events, his life's work might have been far different. From Zeppelin in Germany to Goodyear in Akron, Ohio, Arnstein participated in the design and development of more airships than any other engineer. He could have been a philosopher or mathematician, but a desire to be practical attracted Arnstein to civil engineering. This knowledge spared him from...