Sarah: (voice-over) When I was in the mental hospital, I became obsessed with science. Not all science, actually. And not really science at all. Scientists, and then only nuclear scientists. The ones who invented the bomb. Oppenheimer, Heisenberg, Fermi and Teller. Pioneers. Geniuses all. I read every book I could. I wanted to understand. Why couldn't they stop, these fathers of our destruction? And why wouldn't anybody stop them? And if I had the chance, would I?