" One day June took some papers down to the army personnel office that was processing Louis’s classification. When she left, he had been exempted from the service, but she had been sworn in! She was very patriotic and just got carried away. As a WAC she studied electronics at Northwestern University and learned trigonometry and calculus and God knows what else. She had to do it by intensive tutoring, because she had no special aptitude for higher mathematics. But that’s the sort of person she was; no challenge was too big for her. If she didn’t know something, she’d burrow into library books and find out. June "

― Ray Kroc , Grinding It Out: The Making of McDonald's