Jenkins, who was in contact with underground resistance movements, was especially interested in dirty chemical tricks that could be used by factory workers to sabotage the Nazis. Campbell saw that this was the perfect place to get credit for something that might be used in the field, and he pitched ways to weaken wing struts and disable boilers, while Willy Ley contributed the “diabolic” notion of using airplanes to drop poison ivy or Japanese beetles over Germany. The editor also bombarded Heinlein with his own proposals, including using flares to destroy an attacking pilot’s night vision and
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